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GATE Civil Engineering (CE) 2011 Solved Paper

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Question : 49

Total: 65

A single pipe of length 1500 m and diameter 60 cm connects two reservoirs having a difference of 20 m in their water levels. The pipe is to be replaced by two pipes of the same length and equal diameter d to convey 25% more discharge under the same head loss. If the friction factor is assumed to be the same for all the pipes, the value of d is approximately equal to which of the following options?

37.5 cm
40.0 cm
45.0 cm
50.0 cm

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