The area of the rectangle is 56 square feet
Explanation:Given that the perimeter of a rectangle is 36 ft.
Since it is 4 ft wide, let the length be x.
Then
2(4 + x) = 36 (Perimeter of a rectangle is 2(l + w))
8 + 2x = 36
2x = 36 - 8
2x = 28
x = 28/2 = 14
The area of a rectangle
A = l * x
= 4 * 14
= 56 square feet.
