$\"\"$

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The curve equation is $\"\"$ , $\"\"$ , $\"\"$ and about the $\"\"$ -axis.

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$\"\"$

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$\"\"$ .

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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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Find the intersection points of the two curves $\"\"$ and $\"\"$ .

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Equate both the curves.

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$\"\"$

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We have line $\"\"$ .

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Find the volume of the region over the interval $\"\"$ and $\"\"$ .

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Graph:

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$\"\"$

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$\"\"$

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Outer radius $\"\"$ .

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Inner radius $\"\"$ .

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$\"\"$

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Here integral limits are $\"\"$ and $\"\"$ .

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Volume of the solid is $\"\"$ .

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$\"\"$

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$\"\"$

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Volume of the solid is $\"\"$ .

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$\"\"$

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Volume of the solid is $\"\"$ .