Question

The walls, ceiling and floor of a cubic room need to be painted. The edge length for the cube is 3 meters.

What is the total surface area that will be painted in the room?

Responses

27 m²


30 m²

36 m²

54 m²

Answer 1

The total surface area of a cube can be found using the formula 6s^2, where s is the length of an edge.

In this case, s = 3 meters, so the surface area of one face is 3^2 = 9 square meters.

There are 6 faces in a cube, so the total surface area that needs to be painted is:

6 x 9 = 54 square meters

Therefore, the correct answer is 54 m².