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Water enters through end A with speed v(...

Water enters through end A with speed `v_(1)` and leaves through end B with speed `v_(2)` of a cylindrical tube AB. The tube is always completely fielled with water . Im case I, the tube is horizontal and in case II, it is vertical with end A upwards and in case III, it is vertical with end B upwards. We have `v_(1)=v_(2)` for

A

caseI

B

caseII

C

caseIII

D

each case

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The correct Answer is:
D
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