If n is the rugosity coefficient r is the hydraulic depth...

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If n is the rugosity coefficient, r is the hydraulic depth, s is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula $${\text{V}} = \frac{1}{{\text{n}}}{{\text{r}}^{\frac{2}{3}}}{{\text{s}}^{\frac{1}{2}}}$$ evolved by

A. Chezy

B. Manning

C. Bazin

D. Kutter

Answer: Option B

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