Kerosene oil is flowing through a pipe having constant cross section area with diameter 2.5 cm, at a rate of 10 litre/sec. The height of bottom and top end is 2 m and 8 m respectively from the datum line. Find the pressure at the lower end, if the pressure at the other end is 25×104 N/m2. (Density of kerosene =850 kg/m3)