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civil engineering gate exam questions
1. For a flow of 5.7 MLD (million litres per day) and a detention time of 2 hours, the surface area of a rectangular sedimentation tank to remove all particles having settling velocity of 0.33 mm/s is
(A): 100 m2
(B): 20 m2
(C): 200 m2
(D): 400 m2
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