A solid sphere of radius 3cm is melted and then cast into small sphereical balls each of diameter 0.6 cm. Find the number of balls thus obtained.

Explanation

`r_B=3cm`

`r_s=0.6/2=-0.3`

`V_B=V_S`

Volume of sphere`=4/3pir^3`

`4/3pi3^3=n*4/3*pi*0.3^3`

`27=n(3/10)^3`

`n=1000`.