Water flows in a rectangular concrete channel that is 12m wide at a depth of 2.5m. The channel slope is 0.0028. Find the flow rate in m3/s. n=0.013 CHOICES: 128.73 187.23 137.82 178.32

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A: As per guidelines we need to answer only first question so please repost rest questions separately.

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Highway Drainage

Highway drainage is the process of extracting and regulating the excess surface water on the pavement by giving the desired slope. The construction of a highway drain helps to divert the water present on the surface, and sub-grade by the means of slope. Highway drainage systems are a necessary part of smooth functioning of traffic, since the highway drainage systems provide proper disposal of unwanted substances from the highways.