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

Cd(L - nH)2gH
Cd(L - 0.1nH)2gH3/2
Cd(L - nH)2gH2
Cd(L - 0.2nH)2gH5/2

Correct Answer: Cd(L - 0.1nH)2gH3/2

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