580. The normal values of over flow rates for sedimentation tanks using coagulant, ranges between__________________?

by
A. 25,000 to 35,000 litres/sqm/day
B. 40,000 to 50,000 litres/sqm/day
C. 50,000 to 60,000 litres/sqm/day
D. 80,000 to 100,000 litres/sqm/day
✅ The correct answer is option C.

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