The first thing that we are going to do in passing everything to the same unit. We have then: Cube A: 7 * (1 / 3.28) = 2.13 m Cube B: 2 m The surface area of a cube is: A = 6 * L ^ 2 Where, L: side Since cube A has a longer side (2.13m) then it will have the largest surface area. Answer: Cube A has the larger surface area