Question: A farmer has to enclose a rectangular area with 2 kinds of fencing. On two opposite sides he will use metal fencing and the other

A farmer has to enclose a rectangular area with 2 kinds of fencing. On two opposite sides he will use metal fencing and the other opposite 2 sides he will use wood fencing. He wants to fence an area of 200 square feet. What is the minimum cost of fencing if the metal fencing costs $4.20 per foot and the wood fencing costs $4.50 per foot?

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