$\"\"$

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The velocity of flow of blood is $\"\"$ .

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The blood flows at a distance from the central axis of an artery is $\"\"$ .

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The radius of an artery is $\"\"$ .

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The velocity of flow of blood is $\"\"$ , where $\"\"$ is proportionality constant.

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Find the average rate of flow of blood along a radius of artery.

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Limits are $\"\"$ and $\"\"$ .

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Average value of the function on $\"\"$ is defined as $\"\"$ .

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The average rate of flow of blood along a radius of artery is $\"\"$ .

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Substitute $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The average rate of flow of blood along a radius of artery is $\"\"$ .

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$\"\"$

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The average rate of flow of blood along a radius of artery is $\"\"$ .