Magnetic flux calculations

An aircraft flies horizontally at $6.0\times10^{2}\,\text{km h}^{-1}$ in a region where the vertical component of the Earth’s magnetic field is $2.0\times10^{-5}\,\text{T}$. A potential difference of 0.60 V is induced between the wing tips. Assuming the wings are perpendicular to the field, what is the wingspan?

Use $\varepsilon = Blv$.