If the length of the sides of two cubes are in the ratio 2:1, what is the ratio of their total surface area?
Pick one
A) 2:1  B) 3:1  C) 4:1  D) 6:1  E) 8:1
Let x be the length of the small cube's side.   The total surface area of the small cube is 6x^2.   The total surface area of the large cube is 6(2x)^2=24x^2.   The ratio of surface areas is 4:1.   The answer is 4:1.
<result>C</result>
If the length of the sides of two cubes are in the ratio 2:1, what is the ratio of their total surface area?