UPSC Civil Service Exam Questions - Civil Engineering Questions and Answers

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In a design of storm sewers, if the time taken by rain-water to flow from the farthest point of the watershed to the sewer inlet is 't_i' and the time of flow of water from the sewer inlet to the point in the sewer that is under consideration is 't_f', then the time of concentration will be

t_i

t_f

t_i + t_f

t_i or t_f whichever is greater

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