668. If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is__________________? September 7, 2025 by Admin A. 1.39 m B. 1.49 m C. 1.59 m D. 1.69 m ✅ The correct answer is option D.
