Question: In flowing from section (1) to section (2) along an open channel, the water depth decreases by a factor of 2 and the Froude number

In flowing from section (1) to section (2) along an open channel, the water depth decreases by a factor of 2 and the Froude number changes from a subcritical value of 0.5 to a supercritical value of 3.0. Determine the channel width at (2) if it is $12 \mathrm{ft}$ wide at (1).

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