A rectangular channel \(10 \mathrm{ft}\) wide carries \(100 \mathrm{cfs}\) on a horizontal bed at \(1.0 \mathrm{ft}\) depth. A smooth bump across the channel rises \(4 \mathrm{in}\). above the channel bottom. Find the elevation of the liquid free surface above the bump.

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= 1 ft 14 in. P11.19