Water must flow over a distance of 2 800 m from a large catchment dam to a turbine. The water level in the catchment dam is 1 620 m above sea level and the turbine is situated 1 275 m above sea level. The efficiency of transmission is 65% and 300 kW must be transmitted from the pipeline to the turbine. If ƒ = 0.007, determine the number of 200 mm diameter pipelines, which must be laid in parallel, needed to transmit the required power

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A: P=300kW D=200mm f=0.007 L=2800m

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