Answer:
The length of the fencing is 60 feet.
Step-by-step explanation:
At first we remember that the perimeter formula of the rectangular fence is represented by:
(1)
Where:
- Width, measured in feet.
- Length, measured in feet.
- Perimeter, measured in feet.
From statement, we know the following relation:
(2)
By applying (2) in (1) we expand the equation above:



If we know that
, the width of the fencing is:




And the length of the fencing is:


The length of the fencing is 60 feet.