Question

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
B. 125
C. 144
D. 188

Answer 1

D. 188

Explanation:

• A right rectangular prism has six rectangular faces.
• The surface area of a rectangular prism is the sum of the areas of all six faces.

Because the water tank's dimensions are 6 feet by 4 feet by 7 feet, this means that the areas of the three pairs of opposite faces are:

• Two faces have an area of 6 * 4 = 24 square feet each.

• Two faces have an area of 6 * 7 = 42 square feet each.

• Two faces have an area of 4 * 7 = 28 square feet each.

So, the total surface area of the water tank is 2 * (24 + 42 + 28) = 188 square feet.