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Q.

Water flows through a horizontal pipe of variable cross – section at the rate of  16π litre/s. What will be the velocity of water at a point where radius is 4 cm ?

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a

5 ms-1

b

1 ms-1

c

10 ms-1

d

0.1 ms-1

answer is D.

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Detailed Solution

volume rate=Av
⇒16π×10−3=π×16×10−4×v

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