Question

the present shown below is a cube. 20 cm 20 cm 20 cm find the surface area of the present. cm²

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 value

Here, $a = 20$ cm.

Step3: Calculate surface area

$S=6\times20^{2}=6\times400 = 2400$ $cm^{2}$.

Answer:

2400