A rectangular channel 5.2 m wide and 1.3 m deep has a slope of 1 in 1000 and is lined with good rubble masonry, for which Manning's n = 0.017. It is desired to increase the discharge to a maximum by changing the form of section. The dimensions of the section may be changed but the channel must contain the same amount of lining. Compute the new dimensions and probable increase in discharge.
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sorry wrong answer I gave the wrong answer , don't mark me as a brainliast
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