Question 35893
the fencing is 300 which is the perimeter
so:
l+2w=300
l=300-2w (subsituton)
Area is 11200
So:
(300-2w)(w)=11200
-2w^2+300w-11200=0
w^2-150w+5600=0
Can you solve form there?
you get w=80
and l=140

Paul.