59. A rectangular box is to be made from a rectangular piece of sheet metal 20 inches wide and 30 inches long by cutting a square piece of equal size from each of the corners and bending up the sides so that they make a 90° angle with the base. The base of the finished box will be 200 square inches. About how many inches high will the box be?

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

The subtracted figure is a square. Let the side length of the square be x (that is, the height of the cuboid), (20-2x)(30-2x) = 200, and the solution is x = 5WechatIMG174.png