Question

$50$ circular plates each of diameter $14cm$ and thickness $0.5cm$ are placed one above the other to form a right circular cylinder. Find its total surface area.

Answer 1

Given object is cylinder of radius $7$cm and height,

$l=50\times 0.5=25cm$

$T.S.A=2\pi r(r+l)=1407.43c{m}^2$