Calculate the surface area of a solid box in the shape of a cube with side length 6cm.

216 cm^2

Step-by-step explanation:

A cube has 6 congruent, square faces.

Each face has side length of 6 cm.

The total surface area is the sum of the surface areas of the 6 faces, but since all faces are congruent, the total surface area is

SA = 6s^2

where s = side length

SA = 6 * (6 cm) ^2

SA = 6 * 36 cm^2

SA = 216 cm^2