$\"\"$

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A particle moves along the curve $\"\"$ .

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The particle passes through the point $\"\"$ .

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$\"\"$ - coordinate increases at a rate of $\"\"$ cm/s.

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That is $\"\"$ cm/s.

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Distance from a point $\"\"$ to the origin is $\"\"$ .

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Consider $\"\"$ .

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Differentiate on each side with respect to $\"\"$ .

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$\"\"$

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Substitute $\"\"$ and $\"\"$ in above expression.

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$\"\"$

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$\"\"$

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Consider $\"\"$ .

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$\"\"$ .

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Differentiate on each side with respect to $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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Substitute $\"\"$ , $\"\"$ and $\"\"$ in above expression.

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$\"\"$

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Distance from the particle to origin is changing $\"\"$ at $\"\"$ .

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$\"\"$

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Distance from the particle to origin is changing $\"\"$ at $\"\"$ .