16877. According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions) September 13, 2025 by Admin Cd(L – nH)2gH Cd(L – 0.1nH)2gH3/2 Cd(L – nH)2gH2 Cd(L – 0.2nH)2gH5/2 ✅ The correct answer is option B.