If the volume of two cubes are in the ratio 27:1, the ratio of their edges is: Pick:	A) 3 : 1	B) 3 : 2	C) 3 : 5	D) 3 : 7	E) none of these

Rationale: "explanation : let the edges be a and b of two cubes , then a 3 / b 3 = 27 / 1 = > ( a / b ) 3 = ( 3 / 1 ) 3 a / b = 3 / 1 = > a : b = 3 : 1 option a"
Answer: A