A water supply scheme transports 10 MLD (Million Litres per Day) water through a 450 mm diameter pipeline for a distance of 2.5 km. A chlorine dose of 3.50 mg/litre is applied at the starting point of the pipeline to attain a certain level of disinfection at the downstream end. It is decided to increase the flow rate from 10 MLD to 13 MLD in the pipeline. Assume exponent for concentration, n = 0.86. With this increased flow, to attain the same level of disinfection, the chlorine dose (in mg/litre) to be applied at the starting point should be

A water supply scheme transports 10 MLD (Million Litres per Day) water

1.	A water supply scheme transports 10 MLD (Million Litres per Day) water through a 450 mm diameter pipeline for a distance of 2.5 km. A chlorine dose of 3.50 mg/litre is applied at the starting point of the pipeline to attain a certain level of disinfection at the downstream end. It is decided to increase the flow rate from 10 MLD to 13 MLD in the pipeline. Assume exponent for concentration, n = 0.86. With this increased flow, to attain the same level of disinfection, the chlorine dose (in mg/litre) to be applied at the starting point should be
A.	3.95
B.	4.40
C.	4.75
D.	5.55
Answer» D. 5.55

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