The ratio of the volumes of two cubes is 27 : 64. What is the ratio of their total surface areas? Choices.
A) 18 : 21	B) 81 : 13	C) 8 : 15	D) 16 : 21	E) 1 : 13

Rationale: ratio of the sides = ³ √ 27 : ³ √ 64 = 3 : 4 ratio of surface areas = 32 : 42 = 16 : 21 answer : d
Answer: D