$\"\"$

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The curve is $\"\"$ and the lines are $\"\"$ , $\"\"$ and $\"\"$ .

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Region is rotated about $\"\"$ -axis.

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Method of Cylinders :

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The volume of the solid obtained by rotating about $\"\"$ -axis, the region of the curve $\"\"$ from $\"\"$ to $\"\"$ is

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$\"\"$ .

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Rewrite the curve $\"\"$ as $\"\"$ .

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$\"\"$

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Find the volume obtained by rotating region about $\"\"$ -axis, bounded by the curves $\"\"$ and $\"\"$ from $\"\"$ to $\"\"$ is

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$\"\"$

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$\"\"$

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$\"\"$ .

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Volume obtained by rotating region about $\"\"$ -axis is $\"\"$ .

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$\"\"$

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Volume obtained by rotating region about $\"\"$ -axis is $\"\"$ .