A box is to be made out of a 12 by 20 piece of cardboard. squares of equal size will be cut out of each corner, and then the ends and sides will be folded up to form a box with an open top. find the l

A box is to be made out of a 12 by 20 piece of cardboard. squares of equal size will be cut out of each corner, and then the ends and sides will be folded up to form a box with an open top. find the length l, width w, and height h of the resulting box that maximizes the volume.