physics Q3?

Question

if the wind is blowing southward at 90.0 km/h, what must be the orientation and speed of an airplane if the pilot wishes to fly at a velocity with respect to the ground of 880 km/h westward?

Answer 1

(S)he must fly with airspeed components of 880 km/h westward and 90 km/h northward. The speed must be sqrt(880^2 + 90^2), and the angle must be arctan(90/880) north of due west.