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Question

Water enters through end A with a speed v1 and leaves through end B with a speed v2 of a cylindrical tube AB. The tube is always completely filled with water. In case I the tube is horizontal, in case II it is vertical with the end A upward and in case III it is vertical with the end B upward. We have v1 = v2 for


A

Case I

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B

Case II

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C

Case III

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D

each case

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Solution

The correct option is D

each case


Take any orientation of cylindrical tube [uniform cross section]

Now A1V1=A2V2
But A1=A2
V1=V2
Hence (D)

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