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Water is flowing through a tube of non-u...

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

A

`8:27`

B

`4:9`

C

`1:1`

D

`9:4`

Text Solution

Verified by Experts

The correct Answer is:
B
By equation of continuity , ` a_1 v_1 = a_2 v_2`
`pi r_1^2 v_1 = pi r_2^2 v_2`
`(3)^2 (v_1) = (2)^2 (v_2) " or " v_1/v_2 =4/9`
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