Question

Tracy has 40 feet of material to make the perimeter of a rectangular sandbox for her little brother.

What rectangle with whole-number side lengths would give the sandbox with the greatest area?

Answer 1

11 and 9

Explanation:

With a width of 11 and a length of 9 the area of the rectangle would be

11 * 9 = 99

By adding 11 and 9, then mulitplying it by 2 we get the perimeter

11 + 9 = 20

20 * 2 = 40