Water is pumped from a lake to a standpipe. The input pipe to the pump extends 10 ft below the level of the lake; the pump is 15 ft above lake level and the water in the standpipe is almost constant...

Water is pumped from a lake to a standpipe. The input pipe to the pump extends 10 ft below the level of the lake; the pump is 15 ft above lake level and the water in the standpipe is almost constant at 310 ft above the pump inlet. The lost work due to friction is 140 ft Ibf/lbm for pumping water through the 6,000 ft of 4-in. Schedule 40 pipe used. If the pump capacity is 6,000 gal/hr, what is the work required from the pump in ft lbf/lbm?