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
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a
4 : 9
b
9 : 4
c
8 : 27
d
1 : 1
answer is A.
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Detailed Solution
If velocities of water at entry and exit points are v1 and v2, then according to equation of continuity,A1v1=A2v2⇒v1v2=A2A1=r2r12=232=49
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