Question: In flow past a thin flat body such as an airfoil, transition to turbulence occurs at about Re = 1E6, based on the distance x

In flow past a thin flat body such as an airfoil, transition to turbulence occurs at about Re = 1E6, based on the distance x from the leading edge of the wing. If an airplane flies at 450 mi/h at 8-km standard altitude and undergoes transition at the 12 percent chord position, how long is its chord (wing length from leading to trailing edge)?

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