Question

length of a rectangle is 4ft longer than its width. if the perimeter of the rectangle is 40 ft, find its area.

Answer 1

$$96 \text{ feet}$$

Answer 2

If the width of a rectangle is 'x' feet
and then the length of the rectangle is 4 ft longer, then the length is 'x+4' feet

If the perimeter is 40ft
we know that
(2*x)+2*(4+x)=40
so 2x+8+2x=40
x=8ft

So
width = 8ft
length=12ft

Area = length * width
= 8*12=96 ft^2