A pumping system is employed to pump a flow rate of 0.15 m3/s. The suction pipe diameter is 200 mm and the discharge pipe diameter is 150 mm. The pressure at the beginning of the suction pipe A is −2 m and at the end of the discharge pipe B is 15 m. The discharge pipe is about 1.5 m above the suction pipe and the power of the pumping system engine is 35 kW.

(a) Estimate the pumping system efficiency.

(b) Determine the pressure at B if the power of the pumping system engine with the same efficiency is increased up to 40 kW.