Question

A right circular cylinder just encloses a sphere of radius r. Find
(i) surface area of the sphere,
(ii) curved surface area of the cylinder,​

Answer 1

Answer:

(i) surface area of the sphere

SA of sphere = 4πr²

(ii) curved surface area of the cylinder,

in cylinder then height will be 2r

CSA of cylinder = 2πrh

CSA of cylinder = 2πr(2r) = 4πr²

hope this will help you