How do I get the bearing from a geometric vector? For example, the question below I have no idea how to get it.

16.A plane flies on a heading of 120^o at a constant speed of 550 km/h. If the velocity of the wind is 50 km/h on a bearing 220^o, what is the velocity of the plane with respect to the ground?

The ground speed is 534.966 km/h. How does one get the bearing it is on?