A water tank is in the shape of a right rectangular prism. Its dimensions are 6 feet by 4 feet by 7 feet. What is the surface area of this tank?

A. 110 ft 2

B. 125 ft 2

C. 144 ft 2

D. 188 ft 2

In order to find surface area, you must add up all the area of the sides. On a rectangular prism, there are six sides. However, there are three pairs of identical sides. The sides are: 6x4, 6x7, and 4x7. So you must add them up: 24+42+28=?. Then you must multiply it by two:? x 2. Then you have the answer.