Question

what is the surface area of the cube? 15 ft. 15 ft. 15 ft. square feet

Explanation:

Step1: Recall surface - area formula

The surface - area formula of a cube is $S = 6a^{2}$, where $a$ is the side - length of the cube.

Step2: Identify side - length

The side - length $a = 15$ ft.

Step3: Calculate surface area

Substitute $a = 15$ into the formula: $S=6\times15^{2}=6\times225 = 1350$ square feet.

Answer:

1350