A fireman standing on a 7.2 m high ladder operates a water hose with a round nozzle of diameter 1.54 inch. The lower end of the hose (7.2 m below the nozzle) is connected to the pump outlet of diameter 2.89 inch. The gauge pressure of the water at the pump is

P pump (gauge) =P pump (abs) P atm

= 55.2 PSI = 380.591 kPa .

Calculate the speed of the water jet emerg- ing from the nozzle. Assume that water is an incompressible liquid of density 1000 kg/m^3 and negligible viscosity. The acceleration of gravity is 9.8 m/s2 .

Answer in units of m/s.