The bore and stroke of a double acting pump running at 40 rpm are 0.2 m and 0.4 m. The delivery pipe of 15 cm diameter is 36 m long. The static delivery head is 10 m. All air vessel is fitted at the...

The bore and stroke of a double acting pump running at 40 rpm are 0.2 m and 0.4 m. The delivery pipe of 15 cm diameter is 36 m long. The static delivery head is 10 m. All air vessel is fitted at the level of the pump at a distance of 3 m from the pump.
 = 0.032. Determine the pressure in the pump at the beginning of delivery stroke.