A pipe having an internal diameter D is connected to another pipe of same size. Water flows into the second pipe…

Q: A pipe having an internal diameter D is connected to another pipe of same size. Water flows into the second pipe through ā€˜nā€™ holes, each of diameter d. If the water in the first pipe has speed v, the speed of water leaving the second pipe is

Sol: $\large \pi (\frac{D}{2})^2 v = n \pi (\frac{d}{2})^2 v’ $

$\large v’ = \frac{D^2 v}{n d^2}$