Show that the surface area of a sphere is the same as that of the lateral surface of a right circular cylinder that just encloses the sphere.

Explanation

`D_(cyli nder)=D_(sphere)`

`r_(cyli nder)=r_(sphere)`

`h_(cyli nder)=D_(sphere)`

`(S.A)_(sphere)=4pir^2`

`(S.A)_(cyli nder)=2*pi*r*2r=4pir^2`

`(S.A)_(sphere)=(L.S.A)_(cyli nder)`.