Waste Water Engineering
If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is

2 hours
8 hours
6 hours
4 hours

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Waste Water Engineering
Hydraulic mean radius is

Mean of radii in a pipe line of varying cross -sections
Mean radius of sewer
Difference in heads between two points in circular pipes
Cross-sectional area/wetted perimeter

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