Question

A right circular cylinder just encloses a sphere of radius ( r ) . Find -:

a ) Surface area of the sphere

b) Curved surface area of the cylinder,

c) Ratio of the areas obtained in ( a ) and ( b ).​

Answer 1

Step-by-step explanation:

When radius is r

a) surface area of sphere= 4πr² sq units.

b) curved surface area of cylinder= 2πrh

sq units.

c) ratio of both=4πr²/2πrh=2r/h.