406 in.2
To calculate the amount of cardboard needed for the box, we need to find the surface area of the box.
Surface Area = 2lw + 2lh + 2wh
Surface Area = 2(10x9) + 2(10x7) + 2(9x7)
Surface Area = 180 + 140 + 126
Surface Area = 446 square inches
Since Cherese only has 500 square inches of cardboard, the leftover amount is:
500 - 446 = 54 square inches
Therefore, the correct answer is 54 in.2
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?(1 point)
Responses
54 in.2
446 in.2
406 in.2
426 in.2
1 answer
1 answer