The sum of the surface area of a cube is 54 square centimeters. What is the sum of its edge lengths

The sum of the surface area of a cube is 54 square centimeters. What is the sum of its edge lengths

The area of a surface is 54 / 6 = 9 square centimeters
So the length of an edge is: 3, and the sum is: 3 * 12 = 36 cm