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civil engineering water supply engineering
1. If Q is discharge is cubicmetres per sec and D is the economical diameter of the pipe. According to Lea
(A): D = 0.67 to 0.87 Q
(B): D = 0.77 to 0.97 Q
(C): D = 0.97 to 1.22 Q
(D): D = 1.22 to 1.33 Q .
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