$\"\"$

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Observe the figure:

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The circular cylinder radius is $\"\"$ .

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The cross sections are squares.

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Therfore $\"\"$ .

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The area is $\"\"$ .

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Substitute $\"\"$ in the formula.

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$\"\"$ .

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Find volume.

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The volume of the square is $\"\"$ .

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Integral limits $\"\"$ and $\"\"$ .

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Substitute $\"\"$ and $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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The volume of solid is $\"\"$ cubic units.

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$\"\"$

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The volume of solid is $\"\"$ cubic units.