Question

the area of a rectangular wall of a barn is 117 square feet. its length is 4 feet longer than the width. find the length and width of the wall of the barn?

Answer 1

Area is the product of length and width. If you assume the dimensions are integers, you are looking for factors of 117 that differ by 4.

117 = 1×117 = 3×39 = 9×13

These last two factors differ by 4, so we know the dimensions of the barn are ...

... 9 ft wide by 13 ft long