A centrifugal water pump has an impeller with backwardcurved vanes and an inner diameter of \(0.1 \mathrm{~m}\), an outer diameter of \(0.25 \mathrm{~m}\), and a blade height of \(4 \mathrm{~cm}\). It operates at \(1200 \mathrm{rpm}\). Water enters the impeller at the blade angle of \(50^{\circ}\) and leaves at the blade angle of \(30^{\circ}\). The volume flow rate is \(0.18 \mathrm{~m}^{3} / \mathrm{s}\). Determine the shaft torque and power. Determine the pressure rise when the fluid velocity leaving the pump diffuser is the same as that entering.