12 spheres of the same size are made from melting a solid cylinder of 8 cm diameter and 27 cm height. What is the diameter of each sphere?  Choose the correct choice from the following answers
A) 2 cm B) 4 cm C) 6 cm D) 8 cm E) 10 cm
Volume of cylinder = pi*r^2*h   Volume of a sphere = 4*pi*R^3 / 3   12*4*pi*R^3 / 3 = pi*r^2*h   R^3 = r^2*h / 16 = 27 cm^3   R = 3 cm   D = 6 cm   The answer is 6 cm.
<result>C</result>
12 spheres of the same size are made from melting a solid cylinder of 8 cm diameter and 27 cm height. What is the diameter of each sphere?