Question

The surface area of a sphere is 1386sq.cm.find its volume.

Answer 1

surface area of sphere =1386sq.cm
4πr2=1386sq.cm
4×22/7×r2=1386sq.cm
r2=1386×7/4×22=√53361
r=231

now volume of sphere= 4/3πr3
=4/3×22/7×231×231×231=51653442cm3