A drain carrying 5m3/s of wastewater with its BOD of 100mg/l

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Civil Engineering

47

M: +1.00/-0.33

A drain carrying 5m³/s of wastewater with its BOD of 100mg/l joins a stream carrying 50 m³/s flow with its BOD of 5mg/l. What will be the value of the BOD of the combined flow after complete mixing?

[ESE (IES) CE 2016 P2]

A 3.6 mg/l

B 13.6 mg/l

C 33.6 mg/l

D 53.6 mg/l