An airplane with a wing span of L = 27 m flies horizontally

An airplane with a wing span of L = 27 m flies horizontally at a location where the downward (vertical) component of the Earth’s magnetic field is B = 6.0 x10 -5 T. Calculate the magnitude of the induced emf (in volts) between the tips of the wings when the speed of the plane is v = 239 m/s.