Question: Water flowing with chlorine concentration 10 mg/L at the rate of 20 Liter/min, is discharged into a river if the concentration of chlorine in a river is 5 mg/L what is the flow rate of river?

Options

A : 10 Liter/min

B : 20 Liter/min

C : 30 Liter/min

D : 40 Liter/min

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