The ratio of the volumes of two cubes is 6859 : 1331. What is the ratio of their total surface areas? Options:  A) 1 : 21  B) 12 : 7  C) 1 : 15  D) 21 : 17  E) 13 : 13

Rationale: "ratio of the sides = ³ √ 6859 : ³ √ 1331 = 19 : 11 ratio of surface areas = 192 : 112 = 12 : 7 answer : b"
Answer: B