The surface area of a cube is just the area of all six sides of the cube. Therefore, if we let s = the cube's side, The surface area would be 6 ⋅ s 2 because the area of one face is s 2 and there are six faces Given this, we know from the problem that s = 5 We can just plug in for s. SA = 6 ⋅ 5 2 SA = 6 ⋅ 25 SA = 150
