According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

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📊 Hydraulics and Fluid Mechanics

Q. According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

(A) (2/3) × Cd (L - nH) ×
(B) (2/3) × Cd (L - 0.1nH) × × H3/2
(C) (2/3) × Cd (L - nH) × × H²
(D) (2/3) × Cd (L - nH) × × H5/2

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✅ Correct Answer: (B) (2/3) × Cd (L - 0.1nH) × × H3/2

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