# Physics! another one i need help with

posted by
**Troyyyy**
.

the velocity of the wind would be:

(42km/h)cos(30)=36.37

After flying for 15 min in a wind blowing 42 km/h at an angle of 30° south of east, an airplane pilot is over a town that is 50 km due north of the starting point. What is the speed of the airplane relative to the air in km/h?

what formula do u start with?