exercise:69dcde4b38

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• A box without a top is to be made by cutting equal squares from the corners of a square piece of tin, [math]18[/math] inches on a side, and bending up the sides. How large should the squares be if the volume of the box is to be as large as possible?
• Generalize (a) to the largest open-topped box which can be made from a square piece of tin, [math]s[/math] inches on a side.