calculus

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a rectangular piece of cardboard that measures 4 by 3 inches is to be formed into a rectangular box by cutting squares with length x from each corner and folding up sides. Find the volumes of the box in terms of x

  • calculus -

    4=2h+length
    3=2h+width

    but x has to be h
    Volume=hwl=x(4-2x)(3-2x)

    check that.

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