The total edge length of a cube is 72 cm. What's the length of one side of a cube? What's its surface area

The total edge length of a cube is 72 cm. What's the length of one side of a cube? What's its surface area

First, find the edge length, that is, the side length of a face, 72 △ 12 = 6
The surface area is 6 × 6 × 6 = 216