Math I need by tonight please

Question

A cylinder and a cone have the same volume. The cylinder has a radius of 2 inches and a height of 3 inches. The cone has a radius of 3 inches. What is the height of the cone.

Answer 1

V of cylinder = pi r2 h = 12 pi

V of cone = pi r2 h /3 = 9 pi h /3 = 3 pi h

Therefore, 3 pi h = 12 pi

3h = 12

h = 4