[ h_f = f \fracLD \fracV^22g \quad \Rightarrow \quad 5 = f \frac2000.15 \fracV^219.62 ] [ 5 = f \times 1333.33 \times \fracV^219.62 \quad \Rightarrow \quad V^2 = \frac5 \times 19.621333.33 f = \frac0.0736f ]