Question

Calculate the surface area of a right rectangular prism with dimensions w=12 in. , l=18 in. , and h=8 in. . How many square inches is the surface area?

Answer 1

1. 912
2. 864
3. 272
4. 12
5. 384

Answer 2

Actual answers for the practice are:
1. 912
2. 864
3. 1,350
4. 272
5. 12

Answer 3

The formula for the surface area of a rectangular prism is:

Surface Area = 2lw + 2lh + 2wh

Substituting in the given dimensions:

Surface Area = 2 * 12 * 18 + 2 * 12 * 8 + 2 * 18 * 8
Surface Area = 432 + 192 + 288
Surface Area = 912

The surface area of the prism is 912 square inches.