Question

The length of a rectangle is 2 m longer than its width. if the perimeter of the rectangle is 40 m , find its area.

Answer 1

l=w+2 and 2w+2l=40

Substitute length for w+2 in perimeter formula.

2w+2(w+2)=40
2w+2w+4=40
4w+4=40
4w=36
w=9

l=w+2
l=9+2
l=11

a=lw=11*9=99 meters