A200 mm long pipe slopes down at 1 in 100 and tapers from 0.25m diameter to 0.15 diameter at the lower end. if the pipe carries 100 litres of oil of specific gravity 0.85 find the pressure at the lower end. the upper end gauge reads 50 kpa.

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.