SOLUTION: The Maximum Garden Problem. A farmer has 230 ft of fence to enclose a rectangular garden. What is the largest garden area that can be enclosed with the 230 ft of fence? Explain

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Question 256030: The Maximum Garden Problem. A farmer has 230 ft
of fence to enclose a rectangular garden. What is the
largest garden area that can be enclosed with the 230 ft
of fence? Explain your work

Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
We need two formulas:
(i) P+=+2L+%2B+2W
(ii) A+=+LW
We are told that the perimeter is 230, so (i) becomes
(iii) 230+=+2L+%2B+2W
or
(iv) 115+=+L+%2B+W
step 1 - solve (iv) for L and we get
(v) L+=+115+-+W
step 2 - substitute (v) into (ii) to get
(vi) A+=+%28115-W%29%28W%29
writing (vi) in vertex form, we get
(vii) -1%28W-57.5%29%5E2+%2B+57.5%5E2
So, when W = 57.5, L = 57.5 and the max area is 3306.25 ft sq.