A vented tanker is to be filled with fuel oil with r ! 920 kg/m3 and m ! 0.045 kg/m • s from an underground reservoir using a 20-m-long, 5-cm-diameter plastic hose with a slightly rounded entrance and two 90° smooth bends. The elevation difference between the oil level in the reservoir and the top of the tanker where the hose is discharged is 5 m. The capacity of the tanker is 18 m3 and the filling time is 30 min. Taking the kinetic energy correction factor at hose discharge cen72367_ch08.qxd 12/1/04 7:38 PM Page 391 o be 1.05 and assuming an overall pump efficiency of 82 percent, determine the required power input to the pump.