A right circular cylinder just encloses a sphere of radius `r` as shown in figure. Find the : surface area of the sphere curved surface area of the cylinder ratio of the area obtained in (i) and (ii)

Explanation

S.A of sphere`=4pir^2`

C.S.A of cylinder`=2pirh`

`=2pir(2r)=4pir^2`

`(sphere)/(cyli nder)=(4pir^2)/(4pir^2)=1/1=1:1`.