To find the surface area of the textbook, we need to calculate the areas of all six sides and then add them together.
The textbook has dimensions of 2" x 14" x 9".
The area of the front side (2" x 14") is 28 square inches.
The area of the back side (2" x 14") is 28 square inches.
The area of the top side (14" x 9") is 126 square inches.
The area of the bottom side (14" x 9") is 126 square inches.
The area of the left side (2" x 9") is 18 square inches.
The area of the right side (2" x 9") is 18 square inches.
Adding all these areas together:
28 + 28 + 126 + 126 + 18 + 18 = 344 square inches.
Therefore, the surface area of the textbook is 344 square inches.
Find the surface area of a textbook that is 2” x 14” x 9”
1 answer
1 answer