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A trapezoidal channel with side slope of 2 horizontal: vertical has to be designed to carry dimo 15 m/s at a slope of rin

A trapezoidal channel with side slope of 2 horizontal: vertical has to be designed to carry dimo 15 m/s at a slope of rin 5000. Determine the dimensions of the most efficient channel section. Assure manning's n=0.014

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