A cubical block of metal weighs 6 pounds. How much will another cube of the same metal weigh if its sides are twice as long?  Choose the correct choice from the following choices
A) 48
B) 99
C) 266
D) 28
E) 17

Rationale: "explanation : if you double the sides of a cube , the ratio of the surface areas of the old and new cubes will be 1 : 4 . the ratio of the volumes of the old and new cubes will be 1 : 8 . weight is proportional to volume . so , if the first weighs 6 pounds , the second weighs 6 x 8 pounds = 48 . answer : a ) 48"
Answer: A