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The self cleaning velocity of the sewers is:

ALess than 1.0m/s

B1.0 m/s to 1. 2 m/s

C1.5 m/s to 2.0 m/s

D3.0 m/s to 3.5 m/s

Answer:

B. 1.0 m/s to 1. 2 m/s


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