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2. Pipes 1, 2, 3, and 4 have lengths of 300 m,240 m, 210 m, and 450 m, all being new cast-iron. Pipe 2 and 3 are laid in parallel, both drawing from 1 and discharging into 4. If 1, 2, and 4 have diameters of 200 mm, 150 mm, and 250 mm, respectively. Determine the diameter of 3 when the discharge through the system is 45 liters/sec. under a total headloss of 8 m. Assume f 0..02 2 200mve
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