Step 1:

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The radius of the right circular cone is $\"\"$ .

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The height decrease from $\"\"$ to $\"\"$ .

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Therefore, $\"\"$ .

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The change in height is $\"\"$

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The volume of the right circular cone is $\"\"$ .

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Apply derivative on each side.

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$\"\"$ .

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Here $\"\"$ and $\"\"$ .

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$\"\"$

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Substitute $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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The change in volume is $\"\"$ .

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The $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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