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A liquid enters a tube of variable cross section with a velocity $3 m s^{- 1}$ through the wider end and leaves from the narrower end whose radius is half of the wider one. The velocity with which it leaves the tube is

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1.2 ms-1

12 ms-1

10 ms-1

20 ms-1

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detailed solution

Correct option is B

A1V1=A2V2 V2=A1V1A2=r1r22V1=rr223=12m/s

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A liquid enters a tube of variable cross section with a velocity 3 ms-1 through the wider end and leaves from the narrower end whose radius is half of the wider one. The velocity with which it leaves the tube is

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A liquid enters a tube of variable cross section with a velocity $3 m s^{- 1}$ through the wider end and leaves from the narrower end whose radius is half of the wider one. The velocity with which it leaves the tube is