Question

A cylindrical shaped solid gold of radius 0.5 cm and height 4 cm is melted into liquid form. How many spherical shaped balls of radius 10 cm can be coated with a layer of gold of thickness 5 microns, using this molten gold ?

Answer 1

How many balls, each of radius 1 cm, can be made from a solid sphere of lead of ... That the ball is melted and recast into 3 spherical balls.