Question

Find the surface area of the rectangular prism. A. 69.26 ft^2 B. 70.78 ft^2 C. 71.88 ft^2 D. 72.88 ft^2

Answer 1

The correct answer option is D. 72.88 ft^2.

Explanation:

We are given a diagram of a rectangular prism with width 3 ft, length 3.4 ft and height 4.1 ft and we are to find its surface area.

We know that the surface area of a rectangular prism is given by:

`2(wl * hl * hw)`

So substituting the given values in the above formula to get:

Surface area of rectangular prism =
`2[(3 * 3.4) + (4.1 * 3.4) + (4.1 * 3)]` = 72.88 ft^2

Answer 2

D

Explanation:

The surface area of the rectangular prism is the sum of all the 6 faces.

• There are 2 faces with length 3 ft and width 3.4 feet. Hence,

Area = 2 (3*3.4) = 20.4

• There are 2 faces with length 3 ft and width 4.1 ft. Hence,

Area = 2 (3*4.1) = 24.6

• There are 2 faces with length 3.4 ft and width 4.1 ft. Hence,

Area = 2 (3.4*4.1) = 27.88

Thus, Surface Area = 20.4 + 24.6 + 27.88 = 72.88 ft ^2