Find the surface area of a textbook that is 2 in. × 14 in. × 9 in. (1 point)
Responses
50 in.2
50 in. squared
172 in.2
172 in. squared
344 in.2
344 in. squared
252 in.2
The surface area of a rectangular prism can be calculated by finding the sum of the areas of all six faces.
For the given textbook, the surface area would be:
2(2 in. × 14 in.) + 2(2 in. × 9 in.) + 2(14 in. × 9 in.)
= 2(28 in.) + 2(18 in.) + 2(126 in.)
= 56 in. + 36 in. + 252 in.
= 344 in.2
So the correct answer is:
344 in.2