The areas of the two spheres are in the ratio 1: 4. The ratio of their volume is?  Options:	A) 1 : 4	B) 1 : 16	C) 1 : 8	D) 1 : 64	E) 2 : 3

Rationale: 4 π r 12 : 4 π r 22 = 1 : 4 r 1 : r 2 = 1 : 2 4 / 3 π r 13 : 4 / 3 π r 23 r 13 : r 23 = 1 : 8 answer : c
Answer: C