v = \sqrt{2 \frac{C_{vt} m_{a} g}{ρ c_{õ} A}} = 7 m / s = 25 km tunnis

${v = \sqrt{2 \frac{C_\text{vt} m_\text{a} g}{\rho c_\text{õ} A}} = 7\, \mathrm{m/s} = \text{25 km tunnis}}$

Error