Question

The area of a rectangular wall of a barn is 140 square feet. Its length is 6 feet longer than twice its width. Find the length and width of the wall of the barn.

Answer 1

`l*w=140`

`l=2w+6)`

`(2w+6)*w=2w ^(2) +6w=140`

`70=w^2+3w`

`70=w(w+3)`
w=7

`l=2(7)+6`

`l=20`