A solid iron cylinder of radius 4cm and height 18cm is melted and recast into a sphere. What is the radius of the sphere?
4 cm
6 cm
18 cm
9 cm
12 cm

• ans is 6
  volume of cylinder=pie* r^2*h
  volume of sphere=4/3 *pie*r^3
  as cylinder is melted therefore volume of both will remain same therefore equating both we get
  r^3=216 that is 6
• 6 years agoHelpfull: Yes(7) No(9)