12 spheres of the same size are made from melting a solid cylinder of 8 cm diameter and 1 cm height. What is the diameter of each sphere?
Choose the correct choice from the following answers:	A) 2 cm	B) 4 cm	C) 8 cm	D) 10 cm	E) 12 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 = 1 cm^3   R = 1 cm   D = 2 cm   The answer is 2 cm.
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12 spheres of the same size are made from melting a solid cylinder of 8 cm diameter and 1 cm height. What is the diameter of each sphere?