Question: A rectangular box has the length equal to 3 times its width with an open top. Assume that this box has a fixed surface area

A rectangular box has the length equal to 3 times its width with an open top. Assume that this box has a fixed surface area of 9 m2. Find the width and height of the rectangular box that can maximize its volume. The surface area of the box - 8 width . height + 3(width)2 The volume of the box is V = 3 (width) - height
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