626. The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is____________________? September 7, 2025 by Admin A. 100 cm B. 110 cm C. 120 cm D. 150 cm ✅ The correct answer is option C.