V and R are the regime mean velocity and hydraulic mean depth respect – McqOptions

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1.	V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is
A.	2V²/√3 R
B.	3V²/4R
C.	5V²/2R
D.	2V²/5R
Answer» D. 2V²/5R

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