Answer: 96 square feet
Step-by-step explanation: Surface area is the sum of the areas of all of the faces of a three dimensional figure. If we wanted to find the surface area of the cube, notice that each face of a cube has the same area. We can simply find the area of 1 face of a cube and multiply it by the number of faces. To find the area of 1 face of a cube, we can use the formula for the area of a square.
Area =

Since the length of the side is 4 ft. we have as followed.
(4 ft.)²
16 ft.²
Now, since there are six sides to a cube we have to multiply by 6.
6 (16ft.²)
96 ft.²