The magnitude of a velocity vector is called speed Suppose t

The magnitude of a velocity vector is called speed. Suppose that a wind is blowing from the direction N45

net velocity,V of the plane will be the resultant of the wind velocity and plane velocity in still air

V_East =100cos(30)+ 60sin(45)=129.03 Km/h

V_North =100sin(30) - 60cos(45)=7.57 Km/h

ground speed of the plane=(129.03² + 7.57²) =129.25 Km/h

course of plane =3.3576 degrees north of east =86.64 degrees east of north=N86.64⁰ E