11. Determine the dimensions of a rectangular solid with a square base that maximizes the volume...

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11. Determine the dimensions of a rectangular solid with a square base that maximizes the volume if its surface area is 337.5

math calculus

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I am solving question (11).

Question: 11: Let x, y, h be the dimensions of rectangular box; and x=y as square base. | Surface Area of the rectangular box Thank you!

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