# Question 1.Find the volume of the cylinder if height (h) and radius of the base (r) are as given below.(1) r = 10.5 cm, h = 8 cm(2) r = 2.5 m, h = 7 m(3) r = 4.2 cm, h = 5 cm(4) r = 5.6 cm, h = 5 cmAnswer:Volume of cylinder=π × r2 × h1. r = 10.5 cm, h = 8 cmVolume = π × r2 × h= 3.14 × 10.52 × 8= 2772 cm32. r = 2.5 m, h = 7 mVolume = π × r2 × h= 3.14 × 2.52 × 7= 137.5 cm33. r = 4.2 cm, h = 5 cmVolume = π × r2 × h= 3.14 × 4.22 × 5= 277.2 cm34. r = 5.6 cm, h = 5 cmVolume = π × r2 × h= 3.14 × 5.62 × 5= 492.8 cm3Question 2.How much iron is needed to make a rod of length 90 cm and diameter 1.4 cm?Answer:Given,length/height of the cylindrical rod = 90 cmThe radius of rod Here, we need to calculate the amount of iron required to make a rod.That mean, we need to calculate the volume of the rod.Volume of rod = π × r2 × h= 3.14 × 0.72 × 90= 138.6 cm3∴ Amount of iron required is 138.6 cm3Question 3.How much water will a tank hold if the interior diameter of the tank is 1.6 m and its depth is 0.7 m?Answer:Given,Radius Height = 0.7 mThe volume of tank = π × r2 × h= 3.14 × 0.82 × 0.7= 1.408 m3Now, 1m3 = 1000 litre1.408 m3 = 1408 litre∴ The tank can hold 1408 liter of waterQuestion 4.Find the volume of the cylinder if the circumference of the cylinder is 132 cm and height is 25 cm.Answer:Given,Circumference = 132 cmHeight = 25 cmVolume = ?The circumference of cylinder = 2 × π × r132 = 2 × π × r The volume of cylinder = π × r2 × h= 3.14 × 212 × 25= 34650 cm3∴ The volume of the cylinder is 34650 cm3

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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

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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

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Geography Model Set 1 2020-2021

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