I need help please
Explain

Answer:
C. 90 ft
Step-by-step explanation:
The area of a rectangle is length x width
A = (l)(w)
We already know the area, and the length so we can fill that into our equation.
500 = (20)(w)
if we divide 20 on both sides of the equation, we can solve for w.
500/20 = (20/20) (w)
25 = w
Perimeter = 2(l + w)
Perimeter = 2(20 + 25)
Perimeter = 2(45)
Perimeter = 90
Therefore, the answer is C = 90 ft.