What is the number of wax balls, each of radius 1 cm

What is the number of wax balls, each of radius 1 cm, that can be molded out of a sphere of radius 8 cm?

  1. 1024
  2. 768
  3. 512
  4. 256

Answer

The volume, before and after molding, is same.

Volume of sphere = 4/3*π*r3

n*13 = 83

n = 512

The correct option is C.