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
To find the surface area of the textbook, we need to find the area of each face and then sum them up.
The surface area of a rectangular prism can be found by using the formula:
Surface Area = 2lw + 2lh + 2wh
Given the dimensions of the textbook:
length = 2 in.
width = 14 in.
height = 9 in.
Now we can substitute these values into the formula:
Surface Area = 2(2)(14) + 2(2)(9) + 2(14)(9)
Surface Area = 28 + 36 + 252
Surface Area = 316
Therefore, the surface area of the textbook is 316 square inches. Answer: 316 in.2