Two cubes have side lengths that are equal to 2x
and 4x. How many times greater than the surface of
the small cube is the surface area of the large cube?

Question

imqwerty · Answer

Surface area of a cube  = $6\times (side)^2$ 
You have the sides given as 2x and 4x

imqwerty · Answer

so you can plug in those values and find the two surface areas and then find the ratio of areas of big and small cube that'd be your answer

candygirl220 · Answer

so would I get 24x^2 amd 96x^2?

imqwerty · Answer

Yes

imqwerty · Answer

From that you can tell how many times greater is the surface area of bigger cube