Question

If radius of sphere increased by the 20% then its volume is increased by

Answer 1

hope it helps ..........

Answer 2

let radius be r

as radius increased by 20% than new radius will became r+0.2r=1.2r

initially volume is 4/3 πr^3

now volume becomes ,
4/3 π (1.2r)^3= 4/3 π r^3 (1.2)^3
=4/3 π r^3 (1.728)

so the volume increased by 1.728 times than the initial.