Water rights granted to each citizen by the Emperor of Rome gave permission to attach to the public water main a calibrated, circular, tubular bronze nozzle [17]. Some citizens were clever enough to take unfair advantage of a law that regulated flow rate by such an indirect method. They installed diffusers on the outlets of the nozzles to increase their discharge. Assume the static head available from the main is z0 =1 5 m and the nozzle exit diameter is D=25 mm. (The discharge is to atmospheric pressure.)

Determine the increase in flow rate when a diffuser with N R1 =3 0 and AR=2 0 is attached to the end of the nozzle