You can put this solution on YOUR website!
Let "w" represent the width of the path. After the path has been layed, the new dimensions of the garden area are:
(we must subtract 2w because there is a path at both ends of the lawn),
Now the area is
This area is equal to 400 sq ft:
Now use the quadratic solver
a = 1
b = -25
c = 50
so w=2.191 or w=22.808.
22.808 ft seems ridiculously wide for a garden path, so the answer must be w=2.191ft.
I hope this helps.
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