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b) Water is pumped from a reservoir to the top of a hill through a 150 mm pipe at an average velocity of 3.7 m/s. The pipe discharges water into atmosphere at a level of 1000 m above the level in the reservoir. The pipeline itself is 1500 m long. If the overall efficiency of the pump is 70 percent and the cost of electric energy to the motor is 4 cents per kW-hr, what is the hourly energy cost for running this water? [7]