Answer:
x = 80000/L f
Step-by-step explanation:
When using only three sides for fencing a rectangular area, sides will be
"x " and "y " x = 2*y x is the largest side of the rectangular area
we only fence one y side ( the other side is a river
So the perimeter is L = x + 2*y or L = 4*y
On the other hand if now the area will be 20000 f²
A = x*y = 20000 ⇒ y = 20000/ x
As the fence material is the same as that of the maximum area
L = 4*y L = 4* 20000 / x
L*x = 80000
Then x = 80000/L
Where L is the quantity of fencing material
