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The Manning's formula is given by the expression:

AV= (1/N)R^(2/3) S^(1/2)

BV= C(RS)^0.5

CV= 83.47 R^(2/3) S^(1/2)

DV= 0.85 C R^0.63 S^0.54

Answer:

A. V= (1/N)R^(2/3) S^(1/2)


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