Question

What is the surface area of a cube whose edges are 11 inches long? A. 66 square inches B. 660 square inches C. 726 square inches D. 1,331 square inches

Answer 1

C. 726 in^2.

Explanation:

Each face has area 11^2 = 121 in^2 ( because each face is a square).

There are 6 faces so the total surface area = 6 * 121

= 726 in^2.

Answer 2

C. 726

Explanation:

To calculate the surface are you have to use the next formula:

Total surface area of a cube= Area of a face * number of faces

Tsa= 121*6

Tsa=726

The area of one face is calculated by squaring the edge, in this case the edge is 11, so 11 squared would be 121, and the total number of faces is 6, then you just have to multiply the 121 by the 6 faces and the result is 726.