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It is required to convey 10 m3/s of water at a mean velocity of 1.25 m/s....

It is required to convey 10 m3/s of water at a mean velocity of 1.25 m/s. Calculate the
dimensions of the most efficient section of the channel whose shape is (a) rectangular, (b)
triangular and (c) trapezoidal. Which of these has (i) the least parameter and (ii) the largest
perimeter?
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