To calculate the amount of cardboard needed for the box, we need to find the total surface area of the box.
The formula for the surface area of a rectangular box is:
Surface Area = 2lw + 2lh + 2wh
Given:
Length (l) = 10 inches
Width (w) = 9 inches
Height (h) = 7 inches
Plug in the values:
Surface Area = 2(10)(9) + 2(10)(7) + 2(9)(7)
Surface Area = 180 + 140 + 126
Surface Area = 446 square inches
Therefore, to build the box, Cherese will need 446 square inches of cardboard. With the 500 square inches she has purchased, she will have 500 - 446 = 54 square inches left over.
Cherese needs to buy some cardboard to build a box 10 inches long, 9 inches wide, and 7 inches high. If she purchases 500 square inches of cardboard, how much will be left over?
PLEASE HELP
1 answer
1 answer