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# Question 1.Radii of the circles are given below, find their areas.(1) 28 cm(2) 10.5 cm(3) 17.5 cmAnswer:(1) We know thatarea of circle = πr2Here given that radius of the circle is 28cm = 784π sq cm= 2464 sq cm(2) Here the radius of the circle = 10.5 cm = 110.25π sq cm= 346.5 sq cm(3) Here the radius of the circle is 17.5cm = 306.25π sq cm= 961.625 sq cmQuestion 2.Areas of some circles are given below find their diameters.(1) 176 sq cm(2) 394.24 sq cm(3) 12474 sq cmAnswer:(1) We know that area of circle = πr2Here area of circle = 176cm    (2) Here area of circle = 394.24 sq cm   r = 11.2 cmD = 2r = 2(11.20) = 22.4 cm(3) Here area of circle = 12474 sq cm   D = 2r = 2(63) = 126cmQuestion 3.The diameter of the circular garden is 42 m. There is a 3.5 m wide road around the garden. Find the area of the road. Answer:Given that the diameter of the garden (inner circle) = 42mTherefore, inner radius, r = 21mAlso, given that road surrounds the garden and is 3.5 m wide.Therefore, the diameter of the road (outer circle) will be = 42+2(3.5) = 49mAnd then outer radius, R = 24.5mNow, the area of road = area of the outer circle – area of the inner circlearea of outer circle = πR2= π(24.5)2= 1885 sq marea of inner circle = πr2= π(21)2= 1385 sq mHence, area of road = 1885-1385 = 500 sq mQuestion 4.Find the area of the circle if its circumference is 88 cm.Answer:we know that,The Circumference of a circle = 2πrGiven circumference = 88cm⇒2πr = 88r = 14cmNow, area of circle = πr2= π(14)2= 615.75 sq cm

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2019 Board Paper Solution

HSC ENGLISH SET A 2019 21st February, 2019

HSC ENGLISH SET B 2019 21st February, 2019

HSC ENGLISH SET C 2019 21st February, 2019

HSC ENGLISH SET D 2019 21st February, 2019

SECRETARIAL PRACTICE (S.P) 2019 25th February, 2019

HSC XII PHYSICS 2019 25th February, 2019

CHEMISTRY XII HSC SOLUTION 27th, February, 2019

OCM PAPER SOLUTION 2019 27th, February, 2019

HSC MATHS PAPER SOLUTION COMMERCE, 2nd March, 2019

HSC MATHS PAPER SOLUTION SCIENCE 2nd, March, 2019

SSC ENGLISH STD 10 5TH MARCH, 2019.

HSC XII ACCOUNTS 2019 6th March, 2019

HSC XII BIOLOGY 2019 6TH March, 2019

HSC XII ECONOMICS 9Th March 2019

SSC Maths I March 2019 Solution 10th Standard11th, March, 2019

SSC MATHS II MARCH 2019 SOLUTION 10TH STD.13th March, 2019

SSC SCIENCE I MARCH 2019 SOLUTION 10TH STD. 15th March, 2019.

SSC SCIENCE II MARCH 2019 SOLUTION 10TH STD. 18th March, 2019.

SSC SOCIAL SCIENCE I MARCH 2019 SOLUTION20th March, 2019

SSC SOCIAL SCIENCE II MARCH 2019 SOLUTION, 22nd March, 2019

XII CBSE - BOARD - MARCH - 2019 ENGLISH - QP + SOLUTIONS, 2nd March, 2019

HSC Maharashtra Board Papers 2020

(Std 12th English Medium)

HSC ECONOMICS MARCH 2020

HSC OCM MARCH 2020

HSC ACCOUNTS MARCH 2020

HSC S.P. MARCH 2020

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SSC Maharashtra Board Papers 2020

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English MARCH 2020

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Mathematics (Paper 1) MARCH 2020

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