Question
Question: Water is flowing in a tube of non-uniform radius. The ratio of the radii at entrance and exit ends o...
Water is flowing in a tube of non-uniform radius. The ratio of the radii at entrance and exit ends of the tube is 3:2. The ratio of the velocities of water entering in and exiting from the tube will be –
A
8 : 27
B
4 : 9
C
1:1
D
3 : 2
Answer
4 : 9
Explanation
Solution
a1 v1 = a2 v2
(p r12) v1 = (p ) v2
r12r22 = 94