4.74 A pump takes oil from a supply tank at a pressure of 20o kPa and delivers it through a 2 cm diameter pipe to a high-pressure hydraulic system at

800 kPa. The mass flow rate ofoil is 8 kg / s and its density is 820 kg / m3. What is the power required to drive the pump? Assume the oil is incompressible and the inlet velocity is negligible.