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civil engineering water supply engineering
1. For calculation of economical diameter D of a pipe in metres for a discharge Q to be pumped in cumecs, Lea suggested the empirical formula
(A): D = 0.22 Q
(B): D = 1.22 Q
(C): D = 1.33 Q .
(D): D = 2.22 Q
(E): D = 3.22 Q
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