31 A rectangular piece of cardboard is to be formed into an uncovered box.
The piece of cardboard is 2 centimeters longer than it is wide. A square
that measures 3 centimeters on a side is cut from each corner. When the
sides are turned up to form the box, its volume is 765 cubic centimeters.
Find the dimensions, in centimeters, of the original piece of cardboard.
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Math. B – Aug. ’04