Asingle-stage centrifugal pump is to be used to pump water through a vertical distance of 30m at the rate of 45litres/s. suction and delivery pipes will have a combined length of 36m and a friction factor of 0.006. both will be 150mm diameter. losses at the valve, etc are estimated to total 2.4 times the velocity head in the pipe. the basic design of the pump has a dimensionless specific speed of 0.074 revs, forward curved impeller blades with an outlet angle equal to one-tenth of the diameter. the blades themselves occupy 5% of the circumference. if a manometric efficiency (neglect whirl slip)of 75% may be expected, determine a suitable impeller diameter.