The speed of water is 2m/s through a pipe of internal diameter 10 cm. What should be the internal diameter of nozzle of the pipe if the speed of water at nozzle is 4 m/s?

 

The speed of water is 2m/s through a  pipe of internal diameter 10 cm. What  should be the internal diameter of nozzle  of the pipe if the speed of water at nozzle  is 4 m/s?