The area of the rectangular piece of cardboard shown on the left is 252 square inches. The cardboard is used to make an open box by cutting a 3 inch...

The area of the rectangular piece of cardboard shown on the left is 252 square inches. The cardboard is used to make an open box by cutting a 3 inch square from each corner and turning up the sides. If the box is to have a volume of 288 cubic inches, find the length and width of the cardboard that must be used.