Q.

 An incompressible liquid flows through a horizontal tube as shown in the figure. Then, the velocity of the fluid is

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a

3 m/s

b

1.5 m/s 

c

1.0 m/s

d

2.25 m/s  

answer is C.

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Detailed Solution

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If the liquid is incompressible, then mass of liquid entering through left end should be equal to mass of liquid coming out from the right end.

M=M1+M2

AV1=AV2+1.5A×v

3A=1.5A+1.5Av

v=1m/s

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