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QUESTION

A fence is to be built to enclose a rectangular area of 230 feet.

A fence is to be built to enclose a rectangular area of 230 feet. The fence along three sides is to be made of material that costs 5 dollars per foot, and the material for the fourth side costs 16 dollars per foot. FInd the length L and width W of the enclosure that is most economical to construct.

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