The edge of a cube is equal to 15 centimeters. Find the sum of all the edges of the cube, its surface area.

If the edge of the cube is 15 cm, then knowing that the cube has 12 edges in total, we find their total length:

15 * 12 = 180.

To find the surface area of a cube, you first need to find the area of one face, which looks like a square with a side of 15 cm:

15 * 15 = 225.

Knowing that the number of faces of a cube is 8, we find its full surface:

225 * 8 = 1800.

Answer: the sum of all the edges of the cube is 180 cm. The full side surface of the cube is 1800 cm2.