$\"\"$

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The revolving the region bounded by $\"\"$ .

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$\"\"$ (Derivative)

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Diagram of area of surface

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$\"graph$

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$\"\"$ (Formula for Area of surface)

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$\"\"$ ( $\"\"$ )

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$\"\"$ ( $\"\"$ ) $\"\"$

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$\"\"$ (Integrate)

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$\"\"$ (Substitute)

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$\"\"$ (Simplify)

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$\"\"$ (Cancel common terms) $\"\"$

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The solution is $\"\"$ .