Question

A rectangular sheet of width $14cm$ is revolved along its width and a cylinder of radius $20cm$ is formed. find the volume of the cylinder.

Answer 1

A rectangular paper of width 14 cm is rolled along its width to form a cylinder. So, Height of cylinder $=h=14cm=$ width of the rectangular paper
And, Radius of cylinder (Given) $=r=20cm$
we know Volume of cylinder $=\pi r^{2}h$
Volume of our given cylinder $=\frac{22}{7}\times 20\times 20\times 14=22\times 20\times 20\times 2=17600c{m}^3$