Seawater is to be pumped into a large tank at a rate of 165 kg/min. The tank is open to the atmosphere and the water enters the tank from a 80-m-height. The overall efficiency of the motor-pump unit is 75 percent and the motor consumes electricity at a rate of 3.2 kW. Take the correction factor to be 1. If the irreversible head loss in the piping is 7 m, the velocity of the water at the tank inlet is

(a) 2.34 m/s 

(b) 4.05 m/s 

(c) 6.21 m/s 

(d) 8.33 m/s

(e) 10.7 m/s