Question

A sphere is inscribed in a cyclinder .find the ratio of curved surface areaof the cyclinder and C.S.A of sphere

Answer 1

let radius = a,

height of the cylinder = diameter of the sphere,

then
h=2a,

required ratio= 2πRh : 4πr²,

= a× 2a : 2 × a²,

=1 : 1

Answer 2

Height of the cylinder/radius