Question

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. (Take `22/7` for π)

Answer 1

A cylinder is formed by rolling a rectangle about its width. Hence the width

of the paper becomes height and the radius of the cylinder is 20 cm.

Height of the cylinder = h = 14 cm

Radius = r = 20 cm

Volume of the cylinder = V = πr²h

= `22/7` × 20 × 20 × 14

= 17600 cm³

Hence, the volume of the cylinder is 17600 cm³.