Question

A sewer has a diameter of 300 mm and slope of 1 in 400.
While running full it has a mean velocity of 0.7 m/s. If
both the diameter and slope are doubled (to respectively
be 600 mm and 1 in 200), what will be the changed mean
Velocity when running half-full? Use Manning's formula.
Va) 1.59 m/s
(b) 2.80 m/s
(c) 0.90 m/s
(d) 1.00 m/s
(IES 2012)
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Answer 1

Explanation:

"half" (and any subsequent words) was ignored because we limit queries to 32 words.