Question

what is the surface area of a cube with a side length of 4 cm?
a. 16 sq cm
b. 48 sq cm
c. 64 sq cm
d. 96 sq cm

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: Substitute the side - length value

Given $a = 4$ cm, substitute it into the formula: $S=6\times4^{2}$.

Step3: Calculate the result

First, calculate $4^{2}=16$, then $6\times16 = 96$ square cm.

Answer:

D. 96 sq cm