(a) A circular sedimentation tank fitted with standard mechanical sludge removal equipment is to handle 3.5 million litres per day of raw water. What is the diameter of the tank if the detention time is 5 hrs and the depth of the tank is 3 m .
Explanation
The detention time is the time taken for the water to flow through the tank, and it is given as 5 hours. The volume of water to be handled is 3.5 million litres per day.
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