Example 10 A rectangular paper of width 14 cm is rolled along its width and a cylinder of radius 20 cm is formed. Find the volume of the cylinder (Fig 11.45)? (Take 22/7 for π)
Since rectangle is rolled along its width to make cylinder
Height of cylinder = Width of rectangle = 14 cm
So,
Radius of cylinder = 20 cm
Height of cylinder = 14 cm
Since rectangle is rolled along its width to make cylinder
Height of cylinder = Width of rectangle = 14 cm
So,
Radius of cylinder = 20 cm
Height of cylinder = 14 cm
Volume of cylinder = 𝜋𝑟^2 ℎ
= 𝜋×(20)^2×14
= 22/7×(20)^2×14
= 22/7×20×20×14
= 22×20×20×2
= 44×400
= 44×4×100
= 176×100
= 17600 〖𝑐𝑚〗^3
∴ Volume of the cylinder = 𝟏𝟕𝟔𝟎𝟎 〖𝒄𝒎〗^𝟑

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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