The ratio of the volumes of two cubes is 216 : 343. What is the ratio of their total surface areas?	Choices: A) 81 : 12 B) 31 : 36 C) 81 : 22 D) 8 : 19 E) 1 : 11

Rationale: "ratio of the sides = ³ √ 216 : ³ √ 343 = 6 : 7 ratio of surface areas = 62 : 72 = 31 : 36 answer : b"
Answer: B