### Theory:

A side length of the Rubik's cube is $$6 \ cm$$. Calculate the lateral surface area and the total surface area of the Rubik's cube.

Solution:

Edge (side) of a cube $$=$$ $$6 \ cm$$

Lateral surface area $$=$$ $$4a^2$$

$$=$$ $$4 \times 6^2$$

$$=$$ $$4 \times 36$$

$$=$$ $$144$$

Lateral surface area of the Rubik's cube is $$144 \ cm^2$$.

Total surface area $$=$$ $$6a^2$$

$$=$$ $$6 \times 6^2$$

$$=$$ $$6 \times 36$$

$$=$$ $$216$$

Total surface area of the Rubik's cube is $$216 \ cm^2$$.
Reference:
https://www.shutterstock.com/image-photo/rome-circa-february-2013-example-successfully-1092574646 - Photography by Marco Rubino.