Question

what is the surface area of the cube? 20 mm 20 mm 20 mm square millimeters submit next up done for now? try these next: surface area of triangular prisms surface area of pyramids

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 side - length value

Given $a = 20$ mm, substitute it into the formula: $S=6\times(20)^{2}$.

Step3: Calculate the result

First, $(20)^{2}=20\times20 = 400$. Then, $6\times400 = 2400$ square millimeters.

Answer:

2400