$\"\"$

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Method of washer :

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The volume of the solid $\"\"$ is $\"\"$ , where $\"\"$ is the cross sectional area of the solid $\"\"$ .

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$\"\"$ .

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$\"\"$

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The curves are $\"\"$ and $\"\"$ , $\"\"$ , about the $\"\"$ .

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Outer radius will be distance from the line $\"\"$ to $\"\"$ .

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$\"\"$ .

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Inner radius will be distance from the line $\"\"$ to $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Here $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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Volume is $\"\"$ .