<PRE><B>Question 288246</B>
A box with an open top is made from a rectangular piece of cardboard by cutting a square out of each corner and folding up the flaps to form the sides of the box.
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If the original piece of cardboard is 20 cm by 30 cm, and the squares that are removed each have an edge length of x cm, find a formula for the volume of the box.
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base is (20-2x)(30-2x)
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height is x
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Volume = x(600 - 100x + 4x^2)
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Volume = 4x^3 - 100x + 600x
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Cheers,
Stan H.</PRE>