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26 August, 16:31

Matlab a farmer wishes to build a rectangular pen for his animals out of 40 feet of fencing what should be the length and width of pen so that its area is as great as possible

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  1. 26 August, 17:53
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    Width=w

    length = (40-2w) / 2=20-w

    A=w (40-w)

    A=40w-w²

    A'=40-2w=0

    2w=40

    w=20

    20x20 is the size of the pen having the greatest area. this tells us the largest rectangle for a given perimeter is a square
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