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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?

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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?

(a) 10 Liter/min

(b) 20 Liter/min

(c) 30 Liter/min

(d) 40 Liter/min

I got this question during a job interview.

I would like to ask this question from Multiple Component Systems topic in section Introduction to Material Balances of Basic Chemical Engineering

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The correct option is (a) 10 Liter/min

Explanation: Rate of flow of river = 20*5/10 = 10 Liter/min.

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