Question

find the volume of sphere with a radius of 3cm

Answer 1

v = 3/4 πr^3
= 3/4 × 22/7 × 27
= 113.1 cubic cm.

Answer 2

volume of sphere = 4/3π rcube
                               4/3×22/7×3×3×3 
                                792/7
                               =113.14cm cube {approx}