Properties Of Solids And Liquids Question 227

Question: Water is flowing through a tube of non-uniform cross-section ratio of the radius at entry and exit end of the pipe is 3 : 2. Then the ratio of velocities at entry and exit of liquid is [RPMT 2001]

Options:

A) 4 : 9

B) 9 : 4

C) 8 : 27

D) 1 : 1

Show Answer

Answer:

Correct Answer: A

Solution:

If velocities of water at entry and exit points are v1 and v2, then according to equation of continuity,

A1v1=A2v2

therefore v1v2=A2A1=(r2r1)2=(23)2=49



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