Showing posts with label SSC Board. Show all posts
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10th Geometry July 2024 Question Paper with Solutions in Marathi

рдЧрдгिрдд рднाрдЧ-реи (рднूрдоिрддी) - рдЬुрд▓ै реирежреирек

рд╡ेрд│: реи рддाрд╕ | рдПрдХूрдг рдЧुрдг: рекреж

рдк्рд░рд╢्рди рез. (A) рдЦाрд▓ीрд▓ рдк्рд░рдд्рдпेрдХ рдЙрдкрдк्рд░рд╢्рдиाрд╕ाрдаी рдЪाрд░ рдкрд░्рдпाрдпी рдЙрдд्рддрд░े рджिрд▓ी рдЖрд╣ेрдд. рдд्рдпाрдкैрдХी рдЕрдЪूрдХ рдкрд░्рдпाрдп рдиिрд╡рдбूрди рдд्рдпाрдЪे рд╡рд░्рдгाрдХ्рд╖рд░ рд▓िрд╣ा. (рек рдЧुрдг)
рез) рдЬрд░ $\triangle ABC$ рд╡ $\triangle PQR$ рдордз्рдпे рд╢िрд░ोрдмिंрджूрдЪ्рдпा рдПрдХाрд╕-рдПрдХ рд╕ंрдЧрддीрдд $\frac{AB}{QR}=\frac{BC}{PR}=\frac{CA}{PQ}$, рддрд░ рдЦाрд▓ीрд▓рдкैрдХी рд╕рдд्рдп рд╡िрдзाрди _____ рдЖрд╣े.
  • (A) $\triangle PQR \sim \triangle ABC$
  • (B) $\triangle PQR \sim \triangle CAB$
  • (C) $\triangle CBA \sim \triangle PQR$
  • (D) $\triangle BCA \sim \triangle PQR$
рдЙрдд्рддрд░: (B)
рд╕्рдкрд╖्рдЯीрдХрд░рдг: рдмाрдЬूंрдЪी рдк्рд░рдоाрдгाрдд рд╕ंрдЧрддी: $AB \leftrightarrow QR$, $BC \leftrightarrow PR$, $CA \leftrightarrow PQ$.
рд╢िрд░ोрдмिंрджूंрдЪी рд╕ंрдЧрддी: $A \leftrightarrow Q$, $B \leftrightarrow R$, $C \leftrightarrow P$.
рдо्рд╣рдгूрди, $\triangle ABC \sim \triangle QRP$ рдХिंрд╡ा $\triangle CAB \sim \triangle PQR$.
реи) рджोрди рдмाрд╣्рдпрд╕्рдкрд░्рд╢ी рд╡рд░्рддुрд│ांрдЪ्рдпा рдд्рд░िрдЬ्рдпा рдЕрдиुрдХ्рд░рдоे рел.рел рд╕ेрдоी, рей.рей рд╕ेрдоी рдЖрд╣ेрдд, рддрд░ рдд्рдпांрдЪ्рдпा рдХेंрдж्рд░ाрддीрд▓ рдЕंрддрд░ _____ рдЖрд╣े.
  • (A) рек.рек рд╕ेрдоी
  • (B) рео.рео рд╕ेрдоी
  • (C) реи.реи рд╕ेрдоी
  • (D) рео.рей рд╕ेрдоी
рдЙрдд्рддрд░: (B)
рд╕्рдкрд╖्рдЯीрдХрд░рдг: рдмाрд╣्рдпрд╕्рдкрд░्рд╢ी рд╡рд░्рддुрд│ांрдЪ्рдпा рдХेंрдж्рд░ाрддीрд▓ рдЕंрддрд░ = рдд्рд░िрдЬ्рдпांрдЪी рдмेрд░ीрдЬ = $r_1 + r_2 = 5.5 + 3.3 = 8.8$ рд╕ेрдоी.
рей) рд░ेрдЦ AB рд╣ा Y-рдЕрдХ्рд╖ाрд▓ा рд╕рдоांрддрд░ рдЕрд╕ूрди рдмिंрджू A рдЪे рдиिрд░्рджेрд╢рдХ (рез, рей) рдЖрд╣ेрдд, рддрд░ рдмिंрджू B рдЪे рдиिрд░्рджेрд╢рдХ _____ рдЖрд╣ेрдд.
  • (A) (рей, рез)
  • (B) (рел, рей)
  • (C) (рей, реж)
  • (D) (рез, -рей)
рдЙрдд्рддрд░: (D)
рд╕्рдкрд╖्рдЯीрдХрд░рдг: Y-рдЕрдХ्рд╖ाрд▓ा рд╕рдоांрддрд░ рд░ेрд╖ेрд╡рд░ीрд▓ рд╕рд░्рд╡ рдмिंрджूंрдЪे X-рдиिрд░्рджेрд╢рдХ рд╕рдоाрди рдЕрд╕рддाрдд. A рдЪा X-рдиिрд░्рджेрд╢рдХ рез рдЖрд╣े, рдо्рд╣рдгूрди B рдЪा X-рдиिрд░्рджेрд╢рдХ рез рдЕрд╕ाрд╡ा.
рек) резреж рд╕ेрдоी рдмाрдЬू рдЕрд╕рд▓ेрд▓्рдпा рдШрдиाрдЪे рдШрдирдлрд│ _____ рдЖрд╣े.
  • (A) резрежрежреж рдШрд╕ेрдоी
  • (B) резрежреж рдШрд╕ेрдоी
  • (C) резреж,режрежреж рдШрд╕ेрдоी
  • (D) резреж рдШрд╕ेрдоी
рдЙрдд्рддрд░: (A)
рд╕्рдкрд╖्рдЯीрдХрд░рдг: рдШрдиाрдЪे рдШрдирдлрд│ = $(\text{рдмाрдЬू})^3 = 10^3 = 1000 \text{ рдШрд╕ेрдоी}$.
рдк्рд░рд╢्рди рез. (B) рдЦाрд▓ीрд▓ рдЙрдкрдк्рд░рд╢्рди рд╕ोрдбрд╡ा. (рек рдЧुрдг)
рез) $\triangle ABC$ рдордз्рдпे, $\angle B=90^{\circ}$, $\angle C=30^{\circ}$, $AC=12$ рд╕ेрдоी, рддрд░ рдмाрдЬू AB рдЪी рдХिंрдордд рдХाрдвा.
$30^{\circ}-60^{\circ}-90^{\circ}$ рдд्рд░िрдХोрдгाрдЪ्рдпा рдк्рд░рдоेрдпाрдиुрд╕ाрд░, $30^{\circ}$ рдХोрдиाрд╕рдоोрд░ीрд▓ рдмाрдЬू рдХрд░्рдгाрдЪ्рдпा рдиिрдо्рдоी рдЕрд╕рддे.
$AB = \frac{1}{2} AC$
$AB = \frac{1}{2} \times 12$
$AB = 6$ рд╕ेрдоी
реи) рдЖрдХृрддीрдордз्рдпे, $m(\text{рдХंрд╕ } MN) = 70^{\circ}$, рддрд░ $\angle MLN$ рдЪे рдоाрдк рдХिрддी?
рдЕंрддрд░्рд▓िрдЦिрдд рдХोрдиाрдЪ्рдпा рдк्рд░рдоेрдпाрдиुрд╕ाрд░:
$\angle MLN = \frac{1}{2} m(\text{рдХंрд╕ } MN)$
$\angle MLN = \frac{1}{2} \times 70^{\circ}$
$\angle MLN = 35^{\circ}$
рей) рдХिंрдордд рдХाрдвा: $\sin \theta \times \text{cosec } \theta$.
рдЖрдкрд▓्рдпाрд▓ा рдоाрд╣िрдд рдЖрд╣े рдХी, $\text{cosec } \theta = \frac{1}{\sin \theta}$
$\therefore \sin \theta \times \text{cosec } \theta = \sin \theta \times \frac{1}{\sin \theta}$
рдХिंрдордд = рез
рек) рдЬрд░ рд╡рд░्рддुрд│ाрдЪी рдд्рд░िрдЬ्рдпा рек рд╕ेрдоी рдЖрдгि рд╡рд░्рддुрд│рдХंрд╕ाрдЪी рд▓ांрдмी резреж рд╕ेрдоी рдЕрд╕ेрд▓, рддрд░ рд╡рд░्рддुрд│рдкाрдХрд│ीрдЪे рдХ्рд╖ेрдд्рд░рдлрд│ рдХाрдвा.
рджिрд▓े рдЖрд╣े: рдд्рд░िрдЬ्рдпा ($r$) = рек рд╕ेрдоी, рдХंрд╕ाрдЪी рд▓ांрдмी ($l$) = резреж рд╕ेрдоी.
рд╡рд░्рддुрд│рдкाрдХрд│ीрдЪे рдХ्рд╖ेрдд्рд░рдлрд│ ($A$) = $\frac{l \times r}{2}$
$A = \frac{10 \times 4}{2} = \frac{40}{2}$
рдХ्рд╖ेрдд्рд░рдлрд│ = реиреж рдЪौрд╕ेрдоी

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рдк्рд░рд╢्рди реи. (A) рдЦाрд▓ीрд▓ рдХृрддी рдкूрд░्рдг рдХрд░ूрди рдкुрди्рд╣ा рд▓िрд╣ा (рдХोрдгрдд्рдпाрд╣ी рджोрди). (рек рдЧुрдг)
рез) рд╡рд░ीрд▓ рдЖрдХृрддीрдордз्рдпे, рдЬीрд╡ा PQ рдЖрдгि рдЬीрд╡ा RS рдПрдХрдоेрдХीрд╕ рдмिंрджू T рдордз्рдпे рдЫेрджрддाрдд. рддрд░ $\angle STQ = \frac{1}{2}[m(\text{рдХंрд╕ } SQ) + m(\text{рдХंрд╕ } PR)]$ рд╣े рд╕िрдж्рдз рдХрд░рдг्рдпाрд╕ाрдаी рдХृрддी рдкूрд░्рдг рдХрд░ा.
$\angle STQ = \angle SPQ + $ $\angle PSQ$ (рдд्рд░िрдХोрдгाрдЪ्рдпा рджूрд░рд╕्рде рдЖंрддрд░рдХोрдиांрдЪे рдк्рд░рдоेрдп)
$= \frac{1}{2} m(\text{рдХंрд╕ } SQ) + $ $\frac{1}{2} m(\text{рдХंрд╕ } PR)$ (рдЕंрддрд░्рд▓िрдЦिрдд рдХोрдиाрдЪे рдк्рд░рдоेрдп)
$= \frac{1}{2} [$ $m(\text{рдХंрд╕ } SQ)$ + $m(\text{рдХंрд╕ } PR)$ $]$
реи) рдЬрд░ $\sec \theta = \frac{25}{7}$ рддрд░ $\tan \theta$ рдЪी рдХिंрдордд рдХाрдврдг्рдпाрд╕ाрдаी рдЦाрд▓ीрд▓ рдХृрддी рдкूрд░्рдг рдХрд░ा.
$1 + \tan^2\theta = \sec^2\theta$
$1 + \tan^2\theta = $ $(\frac{25}{7})^2$
$\tan^2\theta = \frac{625}{49} - $ 1
$\tan^2\theta = \frac{625 - 49}{49}$
$\tan^2\theta = \frac{576}{49}$
$\tan \theta = $ $\frac{24}{7}$
рей) рдПрдХा рд╢ंрдХूрдЪ्рдпा рддрд│ाрдЪी рдд्рд░िрдЬ्рдпा рен рд╕ेрдоी рдЕрд╕ूрди рдд्рдпाрдЪी рд▓ंрдм рдЙंрдЪी рем рд╕ेрдоी рдЖрд╣े, рддрд░ рд╢ंрдХूрдЪे рдШрдирдлрд│ рдХाрдврдг्рдпाрд╕ाрдаी рдХृрддी рдкूрд░्рдг рдХрд░ा.
рд╢ंрдХूрдЪे рдШрдирдлрд│ = $\frac{1}{3} \times \pi \times r^2 \times h$
$= \frac{1}{3} \times \frac{22}{7} \times $ $7^2$ $\times 6$
$= \frac{1}{3} \times \frac{22}{7} \times $ $49$ $\times 6$
рд╢ंрдХूрдЪे рдШрдирдлрд│ = рейрежрео рдШрд╕ेрдоी
рдк्рд░рд╢्рди реи. (B) рдЦाрд▓ीрд▓ рдЙрдкрдк्рд░рд╢्рди рд╕ोрдбрд╡ा (рдХोрдгрддेрд╣ी рдЪाрд░). (рео рдЧुрдг)
рез) рдХेंрдж्рд░ P рд╡ рдд्рд░िрдЬ्рдпा рей.реи рд╕ेрдоी рдЕрд╕рд▓ेрд▓्рдпा рд╡рд░्рддुрд│ाрд▓ा рдд्рдпाрд╡рд░ीрд▓ M рдмिंрджूрддूрди рд╕्рдкрд░्рд╢िрдХा рдХाрдвा.
Construct a tangent to a circle with centre P and radius 3.2 cm at any point M on it рд░рдЪрдиेрдЪ्рдпा рдкाрдпрд▒्рдпा:
рез. P рдХेंрдж्рд░ рд╡ рей.реи рд╕ेрдоी рдд्рд░िрдЬ्рдпा рдЕрд╕рд▓ेрд▓े рд╡рд░्рддुрд│ рдХाрдвा.
реи. рд╡рд░्рддुрд│ाрд╡рд░ рдХुрдаेрд╣ी рдмिंрджू M рдШ्рдпा.
рей. рдХिрд░рдг PM рдХाрдвा.
рек. рдмिंрджू M рдордзूрди рдХिрд░рдг PM рд▓ा рд▓ंрдм рд░ेрд╖ा рдХाрдвा. рд╣ी рд░ेрд╖ा рдЕрдкेрдХ्рд╖िрдд рд╕्рдкрд░्рд╢िрдХा рдЖрд╣े.
реи) $\triangle PQR$ рдордз्рдпे, рд░ेрдЦ RS рд╣ा $\angle PRQ$ рдЪा рджुрднाрдЬрдХ рдЖрд╣े. рдЬрд░ $PR=15$, $RQ=20$, $PS=12$, рддрд░ SQ рдХाрдвा.
рдд्рд░िрдХोрдгाрдЪ्рдпा рдХोрдирджुрднाрдЬрдХाрдЪ्рдпा рдк्рд░рдоेрдпाрдиुрд╕ाрд░:
$\frac{PR}{RQ} = \frac{PS}{SQ}$
$\frac{15}{20} = \frac{12}{SQ}$
$SQ = \frac{20 \times 12}{15}$
$SQ = \frac{240}{15}$
$SQ = 16$ рдПрдХрдХ
рей) рдПрдХा рдЧोрд▓ाрдЪा рд╡्рдпाрд╕ резрек рд╕ेрдоी рдЕрд╕ेрд▓ рддрд░ рдд्рдпाрдЪे рд╡рдХ्рд░рдкृрд╖्рдардлрд│ рдХाрдвा.
рд╡्рдпाрд╕ = резрек рд╕ेрдоी $\therefore$ рдд्рд░िрдЬ्рдпा ($r$) = рен рд╕ेрдоी.
рдЧोрд▓ाрдЪे рд╡рдХ्рд░рдкृрд╖्рдардлрд│ = $4\pi r^2$
$= 4 \times \frac{22}{7} \times 7 \times 7$
$= 4 \times 22 \times 7$
$= 88 \times 7$
рд╡рдХ्рд░рдкृрд╖्рдардлрд│ = ремрезрем рдЪौрд╕ेрдоी
рек) рдЖрдХृрддीрдордз्рдпे, $\angle PQR=90^{\circ}$, рд░ेрдЦ $QN \perp$ рд░ेрдЦ PR, $PN=9, NR=16$, рддрд░ QN рдХाрдвा.
рднूрдоिрддीрдордз्рдпाрдЪ्рдпा рдк्рд░рдоेрдпाрдиुрд╕ाрд░:
$QN^2 = PN \times NR$
$QN^2 = 9 \times 16$
$QN^2 = 144$
рджोрди्рд╣ी рдмाрдЬूंрдЪे рд╡рд░्рдЧрдоूрд│ рдШेрдКрди,
$QN = 12$ рдПрдХрдХ
рел) $A(3,3)$ рдЖрдгि $B(5,7)$ рдпा рдмिंрджूрддूрди рдЬाрдгाрд▒्рдпा рд░ेрд╖ेрдЪा рдЪрдв рдХाрдвा.
рд░ेрд╖ेрдЪा рдЪрдв $m = \frac{y_2 - y_1}{x_2 - x_1}$
$m = \frac{7 - 3}{5 - 3}$
$m = \frac{4}{2}$
рдЪрдв = реи
рдк्рд░рд╢्рди рей. (A) рдЦाрд▓ीрд▓ рдХृрддी рдкूрд░्рдг рдХрд░ूрди рдкुрди्рд╣ा рд▓िрд╣ा (рдХोрдгрддीрд╣ी рдПрдХ). (рей рдЧुрдг)
рез) рдЖрдХृрддीрдд AB || CD || EF. рдЬрд░ $AC=12, CE=9, BD=8$, рддрд░ DF рдХाрдврдг्рдпाрд╕ाрдаी рдХृрддी рдкूрд░्рдг рдХрд░ा.
рддीрди рд╕рдоांрддрд░ рд░ेрд╖ा рд╡ рдЫेрджिрдХा рдпांрдЪा рдЧुрдгрдзрд░्рдо:
$\frac{AC}{CE} = \frac{BD}{DF}$
$\frac{12}{9} = \frac{8}{DF}$
$DF = \frac{8 \times 9}{12}$
$DF = $ 6
реи) рдПрдХा рд╡ृрдд्рддрдЪिрддीрдЪ्рдпा рддрд│ाрдЪी рдд्рд░िрдЬ्рдпा рен рд╕ेрдоी рдЖрдгि рдЙंрдЪी реирез рд╕ेрдоी рдЖрд╣े. рддрд░ рд╡ृрдд्рддрдЪिрддीрдЪे рдШрдирдлрд│ рд╡ рддрд│ाрдЪा рдкрд░ीрдШ рдХाрдврдг्рдпाрд╕ाрдаी рдХृрддी рдкूрд░्рдг рдХрд░ा.
рд╡ृрдд्рддрдЪिрддीрдЪे рдШрдирдлрд│ = $\pi r^2 h$
$= \frac{22}{7} \times 7 \times 7 \times $ 21
$= 154 \times 21$
рдШрдирдлрд│ = рейреирейрек рдШрд╕ेрдоी

рддрд│ाрдЪा рдкрд░ीрдШ = $2\pi r$
$= 2 \times \frac{22}{7} \times $ 7
рдкрд░ीрдШ = рекрек рд╕ेрдоी
рдк्рд░рд╢्рди рей. (B) рдЦाрд▓ीрд▓ рдЙрдкрдк्рд░рд╢्рди рд╕ोрдбрд╡ा (рдХोрдгрддेрд╣ी рджोрди). (рем рдЧुрдг)
рез) рд╕िрдж्рдз рдХрд░ा, 'рдЪрдХ्рд░ीрдп рдЪौрдХोрдиाрдЪे рд╕ंрдоुрдЦ рдХोрди рдкрд░рд╕्рдкрд░ांрдЪे рдкूрд░рдХрдХोрди рдЕрд╕рддाрдд'.
рдкрдХ्рд╖: $\square ABCD$ рд╣ा рдЪрдХ्рд░ीрдп рдЪौрдХोрди рдЖрд╣े.
рд╕ाрдз्рдп: $\angle B + \angle D = 180^{\circ}$ рдЖрдгि $\angle A + \angle C = 180^{\circ}$.
рд╕िрдж्рдзрддा:
$\angle ADC$ рд╣ा рдЕंрддрд░्рд▓िрдЦिрдд рдХोрди рдЕрд╕ूрди рдд्рдпाрдиे рдХंрд╕ ABC рдЕंрддрд░्рдЦंрдбिрдд рдХेрд▓ा рдЖрд╣े.
$\therefore \angle ADC = \frac{1}{2} m(\text{рдХंрд╕ } ABC)$ ... (I)
рдд्рдпाрдЪрдк्рд░рдоाрдгे, $\angle ABC$ рд╣ा рдЕंрддрд░्рд▓िрдЦिрдд рдХोрди рдЕрд╕ूрди рдд्рдпाрдиे рдХंрд╕ ADC рдЕंрддрд░्рдЦंрдбिрдд рдХेрд▓ा рдЖрд╣े.
$\therefore \angle ABC = \frac{1}{2} m(\text{рдХंрд╕ } ADC)$ ... (II)
(I) рд╡ (II) рдЪी рдмेрд░ीрдЬ рдХрд░ूрди:
$\angle ADC + \angle ABC = \frac{1}{2} [m(\text{рдХंрд╕ } ABC) + m(\text{рдХंрд╕ } ADC)]$
$\angle D + \angle B = \frac{1}{2} [360^{\circ}]$ (рдХाрд░рдг рдХंрд╕ ABC + рдХंрд╕ ADC рдоिрд│ूрди рдкूрд░्рдг рд╡рд░्рддुрд│ рддрдпाрд░ рд╣ोрддे)
$\mathbf{\angle D + \angle B = 180^{\circ}}$
рдд्рдпाрдЪрдк्рд░рдоाрдгे, $\angle A + \angle C = 180^{\circ}$ рд╣े рд╕िрдж्рдз рдХрд░рддा рдпेрдИрд▓.
реи) рдХेंрдж्рд░ P рд╡ рей.рел рд╕ेрдоी рдд्рд░िрдЬ्рдпा рдШेрдКрди рдПрдХ рд╡рд░्рддुрд│ рдХाрдвा. рд╡рд░्рддुрд│рдХेंрдж्рд░ाрдкाрд╕ूрди рео рд╕ेрдоी рдЕंрддрд░ाрд╡рд░ рдмिंрджू рдШ्рдпा. Q рдмिंрджूрддूрди рд╡рд░्рддुрд│ाрд▓ा рд╕्рдкрд░्рд╢िрдХा рдХाрдвा.
Draw a circle with centre P and radius 3.5 cm. Take point Q at a distance 8 cm from the centre. Construct tangents to the circle from point Q. рд░рдЪрдиेрдЪ्рдпा рдкाрдпрд▒्рдпा:
рез. P рдХेंрдж्рд░ рд╡ рей.рел рд╕ेрдоी рдд्рд░िрдЬ्рдпेрдЪे рд╡рд░्рддुрд│ рдХाрдвा.
реи. P рдкाрд╕ूрди рео рд╕ेрдоी рдЕंрддрд░ाрд╡рд░ рдмिंрджू Q рдШ्рдпा.
рей. рд░ेрдЦ PQ рдЪा рд▓ंрдмрджुрднाрдЬрдХ рдХाрдвूрди рдд्рдпाрдЪा рдордз्рдпрдмिंрджू M рдоिрд│рд╡ा.
рек. M рдХेंрдж्рд░ рд╡ PM рдд्рд░िрдЬ्рдпेрдиे рдоूрд│ рд╡рд░्рддुрд│ाрд▓ा рдЫेрджрдгाрд░े рдХंрд╕ (рдХिंрд╡ा рд╡рд░्рддुрд│) рдХाрдвा, рдЫेрджрдирдмिंрджूंрдиा A рд╡ B рдиाрд╡ рдж्рдпा.
рел. рд░ेрд╖ा QA рдЖрдгि рд░ेрд╖ा QB рдХाрдвा.
рд╣्рдпा рдЕрдкेрдХ्рд╖िрдд рд╕्рдкрд░्рд╢िрдХा рдЖрд╣ेрдд.
рей) P(-2, 3), Q(1, 2), R(4, 1) рд╣े рдмिंрджू рдПрдХрд░ेрд╖ीрдп рдЖрд╣ेрдд рд╣े рджाрдЦрд╡ा.
рд░ेрд╖ेрдЪा рдЪрдв = $\frac{y_2 - y_1}{x_2 - x_1}$
рд░ेрд╖ा PQ рдЪा рдЪрдв = $\frac{2 - 3}{1 - (-2)} = \frac{-1}{3}$
рд░ेрд╖ा QR рдЪा рдЪрдв = $\frac{1 - 2}{4 - 1} = \frac{-1}{3}$
рдпेрдеे, рд░ेрд╖ा PQ рдЪा рдЪрдв = рд░ेрд╖ा QR рдЪा рдЪрдв рдЖрдгि рдмिंрджू Q рд╕ाрдоाрдИрдХ рдЖрд╣े.
рдо्рд╣рдгूрди, рдмिंрджू P, Q рдЖрдгि R рд╣े рдПрдХрд░ेрд╖ीрдп рдЖрд╣ेрдд.
рек) рдЬрд░ $\triangle PQR \sim \triangle LMN$, $9 \times A(\triangle PQR) = 16 \times A(\triangle LMN)$ рдЖрдгि $QR=20$, рддрд░ MN рдХाрдвा.
рджिрд▓े рдЖрд╣े: $9 \times A(\triangle PQR) = 16 \times A(\triangle LMN)$
$\therefore \frac{A(\triangle PQR)}{A(\triangle LMN)} = \frac{16}{9}$
рд╕рдорд░ूрдк рдд्рд░िрдХोрдгांрдЪ्рдпा рдХ्рд╖ेрдд्рд░рдлрд│ांрдЪ्рдпा рдк्рд░рдоेрдпाрдиुрд╕ाрд░:
$\frac{A(\triangle PQR)}{A(\triangle LMN)} = \frac{QR^2}{MN^2}$
$\frac{16}{9} = (\frac{20}{MN})^2$
рджोрди्рд╣ी рдмाрдЬूंрдЪे рд╡рд░्рдЧрдоूрд│ рдШेрдКрди:
$\frac{4}{3} = \frac{20}{MN}$
$MN = \frac{20 \times 3}{4}$
$MN = 15$ рдПрдХрдХ
рдк्рд░рд╢्рди рек. рдЦाрд▓ीрд▓ рдЙрдкрдк्рд░рд╢्рди рд╕ोрдбрд╡ा (рдХोрдгрддेрд╣ी рджोрди). (рео рдЧुрдг)
рез) $\triangle ABC$ рд╣ा рд╕рдорднुрдЬ рдд्рд░िрдХोрдг рдЖрд╣े. рдмिंрджू D рд╣ा рдмाрдЬू BC рд╡рд░ рдЕрд╢ाрдк्рд░рдХाрд░े рдЖрд╣े рдХी $BD = \frac{1}{5} BC$. рддрд░ рд╕िрдж्рдз рдХрд░ा рдХी $\frac{AD^2}{AB^2} = \frac{21}{25}$.
рд╕िрдж्рдзрддा:
$\triangle ABC$ рдордз्рдпे рд░ेрдЦ $AM \perp$ рдмाрдЬू $BC$ рдХाрдвा. рд╕рдорднुрдЬ рдд्рд░िрдХोрдгाрдд рд╢िрд░ोрд▓ंрдм рд╣ा рдордз्рдпрдЧा рдЕрд╕рддो.
$\therefore BM = \frac{1}{2} BC$.
рджिрд▓े рдЖрд╣े $BD = \frac{1}{5} BC$.
$DM = BM - BD = \frac{1}{2}BC - \frac{1}{5}BC = \frac{5-2}{10}BC = \frac{3}{10}BC$.
рдХाрдЯрдХोрди $\triangle AMC$ рдордз्рдпे, $AM = \frac{\sqrt{3}}{2} AB$ (рд╕рдорднुрдЬ рдд्рд░िрдХोрдгाрдЪी рдЙंрдЪी).
рдЖрддा, рдХाрдЯрдХोрди $\triangle AMD$ рдордз्рдпे, рдкाрдпрдеाрдЧोрд░рд╕рдЪ्рдпा рдк्рд░рдоेрдпाрдиुрд╕ाрд░:
$AD^2 = AM^2 + DM^2$
$BC = AB$ рдЕрд╕рд▓्рдпाрдиे:
$AD^2 = (\frac{\sqrt{3}}{2} AB)^2 + (\frac{3}{10} AB)^2$
$AD^2 = \frac{3}{4} AB^2 + \frac{9}{100} AB^2$
$AD^2 = AB^2 (\frac{75}{100} + \frac{9}{100})$
$AD^2 = AB^2 (\frac{84}{100})$
$AD^2 = AB^2 (\frac{21}{25})$
$\therefore \mathbf{\frac{AD^2}{AB^2} = \frac{21}{25}}$
реи) $\triangle LMN \sim \triangle LQP$. $\triangle LMN$ рдордз्рдпे, $LM=3.6$ рд╕ेрдоी, $\angle L=50^{\circ}$, $LN=4.2$ рд╕ेрдоी рдЖрдгि $\frac{LM}{LQ} = \frac{4}{7}$. рддрд░ $\triangle LQP$ рдХाрдвा.
рд╡िрд╢्рд▓ेрд╖рдг:
рдпेрдеे L рд╣ा рд╕ाрдоाрдИрдХ рд╢िрд░ोрдмिंрджू рдЖрд╣े.
рдЧुрдгोрдд्рддрд░ $\frac{LM}{LQ} = \frac{4}{7}$ рдЖрд╣े, рдо्рд╣рдгрдЬेрдЪ $\triangle LQP$ рдЪ्рдпा рдмाрдЬू $\triangle LMN$ рдЪ्рдпा рдмाрдЬूंрдкेрдХ्рд╖ा рдоोрда्рдпा рдЖрд╣ेрдд.
рд░рдЪрдиेрдЪ्рдпा рдкाрдпрд▒्рдпा:
рез. рджिрд▓ेрд▓्рдпा рдоाрдкांрдЪा $\triangle LMN$ рдХाрдвा ($LM=3.6$, $\angle L=50^{\circ}$, $LN=4.2$).
реи. рдмिंрджू L рдордзूрди рдмाрдЬू LM рд╢ी рд▓рдШुрдХोрди рдХрд░рдгाрд░ा рдПрдХ рдХिрд░рдг рдХाрдвा.
рей. рдд्рдпा рдХिрд░рдгाрд╡рд░ рд╕рдоाрди рдЕंрддрд░ाрд╡рд░ рен рдЦुрдгा рдХрд░ा ($A_1$ рддे $A_7$).
рек. рдмिंрджू $A_4$ рдЖрдгि рдмिंрджू M рдЬोрдбा (рдХाрд░рдг LM рдЪे рдк्рд░рдоाрдг рек рдЖрд╣े).
рел. рдмिंрджू $A_7$ рдордзूрди рд░ेрд╖ा $A_4M$ рд▓ा рд╕рдоांрддрд░ рд░ेрд╖ा рдХाрдвा, рдЬी рд╡ाрдврд╡рд▓ेрд▓्рдпा рд░ेрд╖ा LM рд▓ा Q рдордз्рдпे рдЫेрджेрд▓.
рем. рдмिंрджू Q рдордзूрди рдмाрдЬू MN рд▓ा рд╕рдоांрддрд░ рд░ेрд╖ा рдХाрдвा, рдЬी рд╡ाрдврд╡рд▓ेрд▓्рдпा рд░ेрд╖ा LN рд▓ा P рдордз्рдпे рдЫेрджेрд▓.
$\triangle LQP$ рд╣ा рдЕрдкेрдХ्рд╖िрдд рдд्рд░िрдХोрдг рддрдпाрд░ рд╣ोрдИрд▓.
рей) рдирджीрдЪ्рдпा рдкाрдд्рд░ाрдЪी рд░ुंрджी рдХाрдврдг्рдпाрд╕ाрдаी рдПрдХा рдоाрдгрд╕ाрдиे рдкाрдд्рд░ाрдЪ्рдпा рдПрдХा рдХाрдаाрд╡рд░ूрди... рдЭाрдбाрдЪ्рдпा рд╢ेंрдб्рдпाрдХрдбे рдкाрд╣िрд▓े рдЕрд╕рддा ремреж° рдоाрдкाрдЪा рдЙрди्рдирддрдХोрди рд╣ोрддो. реирек рдоी. рдЕंрддрд░ рдоाрдЧे рдЬाрдКрди... рдЙрди्рдирддрдХोрди рейреж° рд╣ोрддो, рддрд░ рдирджीрдкाрдд्рд░ाрдЪी рд░ुंрджी рдЖрдгि рдЭाрдбाрдЪी рдЙंрдЪी рдХाрдвा.
рд╕рдордЬा рдЭाрдбाрдЪी рдЙंрдЪी = $h$ рдоी. рдЖрдгि рдирджीрдЪी рд░ुंрджी = $x$ рдоी.
рд╕्рдеिрддी рез: ремреж° рдХोрди.
$\tan 60^{\circ} = \frac{h}{x} \Rightarrow \sqrt{3} = \frac{h}{x} \Rightarrow h = x\sqrt{3}$ ... (I)
рд╕्рдеिрддी реи: реирек рдоी рдоाрдЧे рдЧेрд▓्рдпाрд╡рд░, рдЕंрддрд░ = $(x + 24)$ рдоी, рдХोрди рейреж°.
$\tan 30^{\circ} = \frac{h}{x+24} \Rightarrow \frac{1}{\sqrt{3}} = \frac{h}{x+24}$
$h\sqrt{3} = x + 24$
(I) рдордзूрди $h$ рдЪी рдХिंрдордд рдаेрд╡ूрди:
$(x\sqrt{3})\sqrt{3} = x + 24$
$3x = x + 24$
$2x = 24 \Rightarrow \mathbf{x = 12 \text{ рдоी}}$ (рдирджीрдЪी рд░ुंрджी)
рдЖрддा, $h = 12\sqrt{3} = 12 \times 1.73 = 20.76$ рдоी.
рдЭाрдбाрдЪी рдЙंрдЪी = реиреж.ренрем рдоी.
рдк्рд░рд╢्рди рел. рдЦाрд▓ीрд▓ рдЙрдкрдк्рд░рд╢्рди рд╕ोрдбрд╡ा (рдХोрдгрддाрд╣ी рдПрдХ). (рей рдЧुрдг)
рез) рдПрдХा рд╡рд░्рддुрд│ाрдХाрд░ рдмाрдЧेрдЪा рд╡्рдпाрд╕ резрей рдоीрдЯрд░ рдЕрд╕ूрди рдмाрдЧेрдЪ्рдпा рджोрди рдк्рд░рд╡ेрд╢рдж्рд╡ाрд░ाрдордзीрд▓ рдЕंрддрд░ резрей рдоीрдЯрд░ рдЖрд╣े. рдмाрдЧेрдЪ्рдпा рдкрд░िрдШाрд╡рд░ рдПрдХ рд╡िрдж्рдпुрдд рдЦांрдм рдЕрд╕ा рдЙрднा рдХрд░ाрд╡рдпाрдЪा рдЖрд╣े, рдЬेрдгेрдХрд░ूрди рдк्рд░рдд्рдпेрдХ рдк्рд░рд╡ेрд╢рдж्рд╡ाрд░ाрдкाрд╕ूрди рд╡ рдЦांрдмाрдкрд░्рдпंрддрдЪ्рдпा рдЕंрддрд░ाрддीрд▓ рдлрд░рдХ рен рдоीрдЯрд░ рдЕрд╕ेрд▓. рдЕрд╕ा рдЦांрдм рдЙрднा рдХрд░рддा рдпेрдИрд▓ рдХा? рдпेрдд рдЕрд╕рд▓्рдпाрд╕ рдЦांрдмाрдЪे рджोрди्рд╣ी рдк्рд░рд╡ेрд╢рдж्рд╡ाрд░ाрдкाрд╕ूрдирдЪे рдЕंрддрд░ рдХाрдвा.
рд╕рдордЬा рдк्рд░рд╡ेрд╢рдж्рд╡ाрд░े A рдЖрдгि B рдЖрд╣ेрдд. $AB = 13$ рдоी. рд╡्рдпाрд╕ = резрей рдоी.
рдпेрдеे рдЬीрд╡ा AB = рд╡्рдпाрд╕ рдЕрд╕рд▓्рдпाрдиे, A рдЖрдгि B рд╣े рд╡्рдпाрд╕ाрдЪे рдЕंрдд्рдпрдмिंрджू рдЖрд╣ेрдд.
рд╕рдордЬा рдЦांрдм P рдмिंрджूрд╡рд░ рдЖрд╣े. $\angle APB = 90^{\circ}$ (рдЕрд░्рдзрд╡рд░्рддुрд│ाрддीрд▓ рдХोрди).
рд╕рдордЬा $PA = x$ рдЖрдгि $PB = y$.
рджिрд▓ेрд▓ा рдлрд░рдХ рен рдоी рдЖрд╣े: $|x - y| = 7$.
рдХाрдЯрдХोрди $\triangle APB$ рдордз्рдпे: $x^2 + y^2 = 13^2 = 169$.
рдЖрдкрд▓्рдпाрд▓ा рдоाрд╣िрдд рдЖрд╣े: $(x-y)^2 = x^2 + y^2 - 2xy$
$7^2 = 169 - 2xy \Rightarrow 49 = 169 - 2xy \Rightarrow 2xy = 120$.
рдЖрддा, $(x+y)^2 = x^2 + y^2 + 2xy = 169 + 120 = 289$.
$\therefore x + y = 17$.
рд╕рдоीрдХрд░рдгे рд╕ोрдбрд╡ूрди ($x+y=17$ рдЖрдгि $x-y=7$):
$2x = 24 \Rightarrow x = 12$.
$y = 5$.
рд╣ोрдп, рдЕрд╕ा рдЦांрдм рдЙрднा рдХрд░рддा рдпेрдИрд▓. рдд्рдпाрдЪी рдк्рд░рд╡ेрд╢рдж्рд╡ाрд░ांрдкाрд╕ूрдирдЪी рдЕंрддрд░े резреи рдоी рдЖрдгि рел рдоी рдЕрд╕рддीрд▓.
реи) $x - 6y + 11 = 0$ рд╣ी рд░ेрд╖ा (8, -1) рдЖрдгि (0, k) рдпा рдмिंрджूंрдиा рдЬोрдбрдгाрд▒्рдпा рд░ेрд╖ाрдЦंрдбाрд▓ा рджुрднाрдЧрддे, рддрд░ k рдЪी рдХिंрдордд рдХाрдвा.
рд╕рдордЬा $A=(8, -1)$ рдЖрдгि $B=(0, k)$.
рд░ेрд╖ाрдЦंрдб AB рд▓ा рд░ेрд╖ा рджुрднाрдЧрддे, рдо्рд╣рдгрдЬेрдЪ AB рдЪा рдордз्рдпрдмिंрджू рдд्рдпा рд░ेрд╖ेрд╡рд░ рдЖрд╣े.
рдордз्рдпрдмिंрджू $M = (\frac{8+0}{2}, \frac{-1+k}{2}) = (4, \frac{k-1}{2})$.
рд╣ा рдмिंрджू $x - 6y + 11 = 0$ рдпा рд╕рдоीрдХрд░рдгाрдд рдаेрд╡ू:
$4 - 6(\frac{k-1}{2}) + 11 = 0$
$4 - 3(k-1) + 11 = 0$
$4 - 3k + 3 + 11 = 0$
$18 - 3k = 0$
$3k = 18$
$k = 6$
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10th Geometry July 2024 Board Exam Question Paper with Solutions

Mathematics Part II (Geometry) - July 2024

Time: 2 Hours | Max. Marks: 40

Q.1 (A) Choose the correct alternative. (4 Marks)
1. In $\triangle ABC$ and $\triangle PQR$, in a one to one correspondence of vertices, if $\frac{AB}{QR} = \frac{BC}{PR} = \frac{CA}{PQ}$, then which of the following statements is true?
  • (A) $\triangle PQR \sim \triangle ABC$
  • (B) $\triangle PQR \sim \triangle CAB$
  • (C) $\triangle CBA \sim \triangle PQR$
  • (D) $\triangle BCA \sim \triangle PQR$
Answer: (B)
Explanation: The sides are proportional as follows: $AB \leftrightarrow QR$, $BC \leftrightarrow PR$, $CA \leftrightarrow PQ$.
Ordering vertices: $A \leftrightarrow Q$, $B \leftrightarrow R$, $C \leftrightarrow P$.
Therefore, $\triangle ABC \sim \triangle QRP$ or $\triangle CAB \sim \triangle PQR$.
2. Two circles of radii 5.5 cm and 3.3 cm respectively touch each other externally. Then the distance between their centres is ____.
  • (A) 4.4 cm
  • (B) 8.8 cm
  • (C) 2.2 cm
  • (D) 8.3 cm
Answer: (B)
Explanation: Distance between centres of externally touching circles = $r_1 + r_2 = 5.5 + 3.3 = 8.8$ cm.
3. Seg AB is parallel to Y-axis and co-ordinates of point A are (1, 3), then the co-ordinates of point B are ____.
  • (A) (3, 1)
  • (B) (5, 3)
  • (C) (3, 0)
  • (D) (1, -3)
Answer: (D)
Explanation: A line parallel to the Y-axis has a constant X-coordinate. Since A is (1, 3), the X-coordinate of B must be 1. Only option (D) matches.
4. The volume of a cube of side 10 cm is ____.
  • (A) $1000 \text{ cm}^3$
  • (B) $100 \text{ cm}^3$
  • (C) $10,000 \text{ cm}^3$
  • (D) $10 \text{ cm}^3$
Answer: (A)
Explanation: Volume of cube = $(\text{side})^3 = 10^3 = 1000 \text{ cm}^3$.
Q.1 (B) Solve the following subquestions. (4 Marks)
1. In $\triangle ABC$, $\angle B=90^{\circ}$, $\angle C=30^{\circ}$, $AC=12$ cm, then find AB.
By $30^{\circ}-60^{\circ}-90^{\circ}$ theorem, the side opposite to $30^{\circ}$ is half the hypotenuse.
$AB = \frac{1}{2} AC$
$AB = \frac{1}{2} \times 12$
$AB = 6$ cm
2. In a circle, if $m(\text{arc } MN) = 70^{\circ}$, find $\angle MLN$.
By Inscribed Angle Theorem:
$\angle MLN = \frac{1}{2} m(\text{arc } MN)$
$\angle MLN = \frac{1}{2} \times 70^{\circ}$
$\angle MLN = 35^{\circ}$
3. Find the value of $\sin \theta \times \csc \theta$.
We know that $\csc \theta = \frac{1}{\sin \theta}$
$\therefore \sin \theta \times \csc \theta = \sin \theta \times \frac{1}{\sin \theta}$
Value = 1
4. If radius of a circle is 4 cm and length of an arc is 10 cm, then find the area of the sector.
Given: $r = 4$ cm, length of arc ($l$) = 10 cm.
Area of Sector ($A$) = $\frac{l \times r}{2}$
$A = \frac{10 \times 4}{2} = \frac{40}{2}$
Area = 20 cm$^2$

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Q.2 (A) Complete the activities (Any 2). (4 Marks)
1. Chord PQ and chord RS intersect at point T. Prove $\angle STQ = \frac{1}{2}[m(\text{arc } SQ) + m(\text{arc } PR)]$.
$\angle STQ = \angle SPQ + $ $\angle PSQ$ (Exterior angle theorem of a triangle)
$= \frac{1}{2} m(\text{arc } SQ) + $ $\frac{1}{2} m(\text{arc } PR)$ (Inscribed angle theorem)
$= \frac{1}{2} [$ $m(\text{arc } SQ)$ + $m(\text{arc } PR)$ $]$
2. If $\sec \theta = \frac{25}{7}$, find the value of $\tan \theta$.
$1 + \tan^2\theta = \sec^2\theta$
$1 + \tan^2\theta = $ $(\frac{25}{7})^2$
$\tan^2\theta = \frac{625}{49} - $ 1
$\tan^2\theta = \frac{625 - 49}{49}$
$\tan^2\theta = \frac{576}{49}$
$\tan \theta = $ $\frac{24}{7}$
3. Find the volume of a cone if radius is 7 cm and height is 6 cm.
Volume of cone = $\frac{1}{3} \times \pi \times r^2 \times h$
$= \frac{1}{3} \times \frac{22}{7} \times $ $7^2$ $\times 6$
$= \frac{1}{3} \times \frac{22}{7} \times $ $49$ $\times 6$
Volume of cone = 308 cm$^3$
Q.2 (B) Solve the following (Any 4). (8 Marks)
1. Construct a tangent to a circle with centre P and radius 3.2 cm at any point M on it.
Construct a tangent to a circle with centre P and radius 3.2 cm at any point M on it Steps of construction:
1. Draw a circle with centre P and radius 3.2 cm.
2. Take any point M on the circle.
3. Draw ray PM.
4. Draw a line perpendicular to ray PM passing through point M. This line is the required tangent.
2. In $\triangle PQR$, seg RS bisects $\angle PRQ$. If $PR=15$, $RQ=20$, $PS=12$, then find SQ.
By the Angle Bisector Theorem:
$\frac{PR}{RQ} = \frac{PS}{SQ}$
$\frac{15}{20} = \frac{12}{SQ}$
$SQ = \frac{20 \times 12}{15}$
$SQ = \frac{240}{15}$
$SQ = 16$ units
3. Find the surface area of a sphere of diameter 14 cm.
Diameter = 14 cm $\therefore$ Radius ($r$) = 7 cm.
Surface Area = $4\pi r^2$
$= 4 \times \frac{22}{7} \times 7 \times 7$
$= 4 \times 22 \times 7$
$= 88 \times 7$
Surface Area = 616 cm$^2$
4. In $\triangle PQR, \angle PQR=90^{\circ}$, seg $QN \perp$ seg PR, $PN=9, NR=16$, find QN.
By Theorem of Geometric Mean:
$QN^2 = PN \times NR$
$QN^2 = 9 \times 16$
$QN^2 = 144$
Taking square root,
$QN = 12$ units
5. Find the slope of the line passing through the points A(3,3) and B(5,7).
Slope $m = \frac{y_2 - y_1}{x_2 - x_1}$
$m = \frac{7 - 3}{5 - 3}$
$m = \frac{4}{2}$
Slope = 2
Q.3 (A) Complete the activities (Any 1). (3 Marks)
1. Line AB || Line CD || Line EF. If $AC=12, CE=9, BD=8$, find DF.
Property of three parallel lines and their transversal:
$\frac{AC}{CE} = \frac{BD}{DF}$
$\frac{12}{9} = \frac{8}{DF}$
$DF = \frac{8 \times 9}{12}$
$DF = $ 6
2. Cylinder: Radius 7 cm, Height 21 cm. Find Volume and Circumference of base.
Volume of cylinder = $\pi r^2 h$
$= \frac{22}{7} \times 7 \times 7 \times $ 21
$= 154 \times 21$
Volume = 3234 cm$^3$

Circumference of base = $2\pi r$
$= 2 \times \frac{22}{7} \times $ 7
Circumference = 44 cm
Q.3 (B) Solve the following (Any 2). (6 Marks)
1. Prove that, 'Opposite angles of a cyclic quadrilateral are supplementary'.
Given: $\square ABCD$ is cyclic.
To Prove: $\angle B + \angle D = 180^{\circ}$ and $\angle A + \angle C = 180^{\circ}$.
Proof:
$\angle ADC$ is an inscribed angle intercepting arc ABC.
$\therefore \angle ADC = \frac{1}{2} m(\text{arc } ABC)$ ... (I)
Similarly, $\angle ABC$ is an inscribed angle intercepting arc ADC.
$\therefore \angle ABC = \frac{1}{2} m(\text{arc } ADC)$ ... (II)
Adding (I) and (II):
$\angle ADC + \angle ABC = \frac{1}{2} [m(\text{arc } ABC) + m(\text{arc } ADC)]$
$\angle D + \angle B = \frac{1}{2} [360^{\circ}]$ (Since arc ABC + arc ADC constitutes the complete circle)
$\mathbf{\angle D + \angle B = 180^{\circ}}$
Similarly, we can prove $\angle A + \angle C = 180^{\circ}$.
2. Draw a circle with centre P and radius 3.5 cm. Take point Q at a distance 8 cm from the centre. Construct tangents to the circle from point Q.
Draw a circle with centre P and radius 3.5 cm. Take point Q at a distance 8 cm from the centre. Construct tangents to the circle from point Q. Construction Steps:
1. Draw circle with centre P, $r = 3.5$ cm.
2. Draw segment PQ = 8 cm.
3. Draw perpendicular bisector of seg PQ to find midpoint M.
4. Draw a circle (or arcs) with centre M and radius MP to cut the original circle at points A and B.
5. Draw line QA and line QB.
QA and QB are the required tangents.
3. Show that points $P(-2,3)$, $Q(1,2)$, $R(4,1)$ are collinear.
Slope of line = $\frac{y_2 - y_1}{x_2 - x_1}$
Slope of PQ = $\frac{2 - 3}{1 - (-2)} = \frac{-1}{3}$
Slope of QR = $\frac{1 - 2}{4 - 1} = \frac{-1}{3}$
Since Slope of PQ = Slope of QR and point Q is common,
Points P, Q, and R are collinear.
4. If $\triangle PQR \sim \triangle LMN$, $9 \times A(\triangle PQR) = 16 \times A(\triangle LMN)$ and $QR=20$, then find MN.
Given: $9 \times A(\triangle PQR) = 16 \times A(\triangle LMN)$
$\therefore \frac{A(\triangle PQR)}{A(\triangle LMN)} = \frac{16}{9}$
Since triangles are similar, ratio of areas = ratio of squares of corresponding sides.
$\frac{A(\triangle PQR)}{A(\triangle LMN)} = \frac{QR^2}{MN^2}$
$\frac{16}{9} = (\frac{20}{MN})^2$
Taking square root of both sides:
$\frac{4}{3} = \frac{20}{MN}$
$MN = \frac{20 \times 3}{4}$
$MN = 15$ units
Q.4 Solve the following (Any 2). (8 Marks)
1. $\triangle ABC$ is an equilateral triangle. Point D is on seg BC such that $BD = \frac{1}{5} BC$. Then prove that $\frac{AD^2}{AB^2} = \frac{21}{25}$.
Proof:
Draw $AM \perp BC$. Since $\triangle ABC$ is equilateral, AM is the median.
$\therefore BM = \frac{1}{2} BC$.
Given $BD = \frac{1}{5} BC$.
$DM = BM - BD = \frac{1}{2}BC - \frac{1}{5}BC = \frac{5-2}{10}BC = \frac{3}{10}BC$.
In right angled $\triangle AMC$, height $AM = \frac{\sqrt{3}}{2} AB$ (Altitude of equilateral triangle).
Now, in right angled $\triangle AMD$, by Pythagoras theorem:
$AD^2 = AM^2 + DM^2$
Since $AB = BC$ (Equilateral), substitute BC with AB:
$AD^2 = (\frac{\sqrt{3}}{2} AB)^2 + (\frac{3}{10} AB)^2$
$AD^2 = \frac{3}{4} AB^2 + \frac{9}{100} AB^2$
$AD^2 = AB^2 (\frac{75}{100} + \frac{9}{100})$
$AD^2 = AB^2 (\frac{84}{100})$
$AD^2 = AB^2 (\frac{21}{25})$
$\therefore \mathbf{\frac{AD^2}{AB^2} = \frac{21}{25}}$
2. $\triangle LMN \sim \triangle LQP$. In $\triangle LMN$, $LM=3.6$ cm, $\angle L=50^{\circ}$, $LN=4.2$ cm and $\frac{LM}{LQ} = \frac{4}{7}$. Construct $\triangle LQP$.
Analysis:
Since vertex L is common, we treat this as constructing similar triangles with a common vertex.
Ratio $\frac{LM}{LQ} = \frac{4}{7}$ implies sides of $\triangle LQP$ are larger than $\triangle LMN$.
Steps:
1. Draw $\triangle LMN$ with $LM=3.6$, $\angle L=50^{\circ}$, $LN=4.2$.
2. Draw a ray from L at an acute angle to LM.
3. Mark 7 equal points on the ray ($A_1$ to $A_7$).
4. Join $A_4$ to M (Since LM corresponds to 4 parts).
5. Draw a line parallel to $A_4M$ from $A_7$ intersecting line LM extended at Q.
6. From Q, draw a line parallel to MN intersecting line LN extended at P.
$\triangle LQP$ is the required triangle.
3. To find the width of the river, a man observes the top of a tree on the opposite bank making an angle of elevation of $60^{\circ}$. When he moves 24 meter backward... angle becomes $30^{\circ}$. Find height of tree and width of river. ($\sqrt{3}=1.73$)
Let height of tree = $h$ m. Let initial width of river = $x$ m.
Case 1: Angle $60^{\circ}$.
$\tan 60^{\circ} = \frac{h}{x} \Rightarrow \sqrt{3} = \frac{h}{x} \Rightarrow h = x\sqrt{3}$ ... (I)
Case 2: Angle $30^{\circ}$ from distance $(x + 24)$.
$\tan 30^{\circ} = \frac{h}{x+24} \Rightarrow \frac{1}{\sqrt{3}} = \frac{h}{x+24}$
$h\sqrt{3} = x + 24$
Substitute $h$ from (I):
$(x\sqrt{3})\sqrt{3} = x + 24$
$3x = x + 24$
$2x = 24 \Rightarrow \mathbf{x = 12 \text{ m}}$ (Width of river)
Now, $h = 12\sqrt{3} = 12 \times 1.73 = 20.76$ m.
Height of tree = 20.76 m.
Q.5 Solve the following (Any 1). (3 Marks)
1. The diameter of a circular garden is 13 m. The distance between two gates is 13 m. An electric pole is to be erected on the circumference such that the difference between distance of the pole from each gate is 7 m. Can such a pole be erected? If yes, find distances.
Let gates be A and B. $AB = 13$ m. Diameter = 13 m.
Since chord AB = Diameter, the gates are at opposite ends of the diameter.
Let Pole be at P. $\angle APB = 90^{\circ}$ (Angle in a semicircle).
Let $PA = x$ and $PB = y$.
Given difference is 7m: $|x - y| = 7$.
In right $\triangle APB$: $x^2 + y^2 = 13^2 = 169$.
We know: $(x-y)^2 = x^2 + y^2 - 2xy$
$7^2 = 169 - 2xy \Rightarrow 49 = 169 - 2xy \Rightarrow 2xy = 120$.
Now, $(x+y)^2 = x^2 + y^2 + 2xy = 169 + 120 = 289$.
$\therefore x + y = 17$.
Solving $x+y=17$ and $x-y=7$:
$2x = 24 \Rightarrow x = 12$.
$y = 5$.
Yes, the pole can be erected at distances 12 m and 5 m from the gates.
2. The line $x - 6y + 11 = 0$ bisects the segment joining points (8, -1) and (0, k), find k.
Let $A=(8, -1)$ and $B=(0, k)$.
Since the line bisects segment AB, the midpoint of AB lies on the line.
Midpoint $M = (\frac{8+0}{2}, \frac{-1+k}{2}) = (4, \frac{k-1}{2})$.
Substitute M in equation $x - 6y + 11 = 0$:
$4 - 6(\frac{k-1}{2}) + 11 = 0$
$4 - 3(k-1) + 11 = 0$
$4 - 3k + 3 + 11 = 0$
$18 - 3k = 0$
$3k = 18$
$k = 6$
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Maharashtra SSC Exam Pattern 2026: Subject-Wise Marking Scheme and Details

Maharashtra SSC Exam Pattern 2026, Check Subject Wise Exam Pattern

Maharashtra SSC Exam Pattern 2026 has been released by the conducting authority on the official website. Check the Maharashtra SSC Exam Pattern 2026 details here.

Maharashtra SSC Exam Pattern 2026: The Maharashtra Board has released the Maharashtra SSC Exam Pattern 2026 for all subjects, including English, Mathematics, Science, Social Science, and more. Each subject carries a total of 100 marks.

However, certain subjects involving practical exams have 80 marks designated for theory and an additional 20 marks allotted for practical assessments. Scheduled in March 2026, the Maharashtra SSC Board 2026 will administer the board exams. Reviewing the Maharashtra Class 10th Exam Pattern 2026 beforehand enables students to prepare effectively, aligning their studies with the exam structure to achieve better scores.

Maharashtra SSC Exam Pattern 2026

It is imperative that students comprehend the Maharashtra SSC Exam Pattern 2026, as it not only aids in efficient exam preparation but also makes it easier to achieve higher grades. Students are recommended to solve sample papers in addition to the Maharashtra SSC Exam Pattern 2026 to obtain a thorough understanding of the exam format. The exam will follow the pen and paper format and be administered offline. The six mandatory disciplines that students must attend are English, Mathematics, Science, Social Science, and two elective language subjects that they may choose from. The board exam will last three hours for each subject.

Maharashtra SSC Exam Pattern 2026 Overview

For the Class 10 exams conducted by the Maharashtra Board, candidates are required to cover five essential subjects: English, a second language (Hindi, Bengali, Marathi, etc.), mathematics, science, and social science. Below are key highlights for the Maharashtra SSC Exam Pattern 2026.

Maharashtra SSC Exam Pattern 2026
Exam ModeOffline
MediumHindi & English
Duration3 Hours
Type of QuestionsMultiple Choice, Long/Short Questions
SubjectsEnglish, Mathematics, Science, Social Science, and two optional language subjects
Total Marks100
Negative MarkingNo
Theory Exam80
Internal Assessment20
Passing Marks33% Aggregate in Each Subject & Overall

Maharashtra SSC Exam Pattern 2026 Subject Wise

Although the basic Maharashtra SSC Syllabus 2026 and marking scheme are not revised this year, it is important to remember that different courses have varied exam patterns. Students can examine the subject-specific Maharashtra SSC Exam Pattern 2026 in this section to gain a thorough grasp of the marking system and assessment framework for each subject.

Maharashtra SSC Exam Pattern 2026 English

The English paper for Maharashtra 10th Board 2026 is scheduled for a 3-hour duration, accounting for a total of 100 marks. The paper is divided into four sections: Reading Skills (Textual), Reading Skills (Non-textual), Grammar, and Writing Skills. The marks distribution according to Maharashtra SSC English Exam Pattern 2026 is outlined below:

Maharashtra SSC English Exam Pattern 2026
Components Sections Marks
Written Test Reading Skills (Textual) 20
Reading Skills (Non-textual) 20
Grammar 15
Writing Skills 25
Internal Assessment Oral Tests 20
Total 100

Maharashtra SSC Exam Pattern 2026 for Mathematics

The Mathematics paper for Maharashtra 10th Board 2026 extends over a 3-hour duration and holds a total of 100 marks. Divided into two sections, Section 1 focuses on Algebra, and Section 2 pertains to Geometry. Each section carries 40 marks and includes various types of questions as per the Maharashtra SSC Mathematics Exam Pattern 2026.

Maharashtra SSC Mathematics Exam Pattern 2026
Type of Questions Total Marks Weightage Number of Questions
1 Mark Questions555
2 Marks Questions844
3 Marks Questions933
4 Marks Questions822
5 Marks Questions1022

Maharashtra SSC Exam Pattern 2026 for Science

The Science paper for Maharashtra 10th Board 2026 spans a 3-hour duration and totals 100 marks. The paper is split into two sections: Science & Technology Part 1 and Science & Technology Part 2, both carrying 40 marks each. Below is the marks distribution for Maharashtra SSC Science Exam Pattern 2026.

Maharashtra SSC Science Exam Pattern 2026
Type of Questions Total Marks Weightage Number of Questions
1 Mark Questions1010-
2 Marks Questions105-
3 Marks Questions155-
5 Marks Questions51-

Maharashtra SSC Exam Pattern 2026 for Social Science

The Social Science paper for Maharashtra 10th Board 2026 is scheduled for a 3-hour duration, encompassing a total of 100 marks. Divided into two sections, Part A covers History and Political Science, while Part B includes Geography and Economics. Each section holds 40 marks and follows a similar question type as per the Maharashtra SSC Social Science Exam Pattern 2026.

Maharashtra SSC Social Science Exam Pattern 2026
Sections Subjects Marks Distribution
Part A History 28
Political Science 12
Part B Geography 28
Economics 12
Overall 80

Maharashtra SSC Exam Pattern 2026 for Optional Subject

As per the Maharashtra SSC Exam Pattern 2026, the optional subject paper for Maharashtra 10th Board 2026 is allotted a 3-hour duration. Candidates have the liberty to select any two papers as per their preference. The choices for language subjects encompass Modern Indian Languages, Classical Languages, and Modern Foreign Languages. The paper is conducted for a total of 100 marks.

Maharashtra Board Class 10 Exam Pattern 2026 Marking Scheme Summary

The article describes the Maharashtra SSC Exam Pattern 2026 for all subjects, including English, Mathematics, Science, Social Science, and two optional language subjects. The exam will be conducted offline and will last for 3 hours. Each subject will be divided into sections, with each section carrying a specific number of marks.