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In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is_______________?

/ Civil Engineering Mcqs, Waste Water Engineering / By
In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is_______________?

A. D
B. D /2
C. D/3
D. D/4