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Math

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The length of a piece of cardboard is two inches more than its width. an open box is formed by cutting out 4 inch squares from each corner and folding the sides. If the volume of the box is 672 cubic inches, find the dimensions.

  • Math - ,

    Volume of rectangular prism
    672 = 4*w*(w+2)

    Thus:
    w^2 + 2w - 168 = 0

    Solve for w, using quadratic formula
    w = (-b ± √(b^2-4ac))/(2a),
    where
    a = 1, b = 2, c = -168

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