The surface area of a rectangular solid can be found by adding up the areas of all six sides.
The textbook has a length of 14 inches, a width of 9 inches, and a height of 2 inches.
The area of the top and bottom sides is 14 inches times 9 inches, which is 126 square inches each.
The area of the front and back sides is 14 inches times 2 inches, which is 28 square inches each.
The area of the two side sides is 9 inches times 2 inches, which is 18 square inches each.
Adding all the areas together, we have:
2(126) + 2(28) + 2(18) = 252 + 56 + 36 = 344.
So, the surface area of the textbook is 344 square inches.
Find the surface area of a textbook that is 2 in. × 14 in. × 9 in.(1 point)
1 answer