The speed of an aeroplane in still air is 200kmh–1. The wind blows from the west at a speed of
85.0kmh–1.
In which direction must the pilot steer the aeroplane in order to fly due north?
A 23.0° east of north
B 23.0° west of north
C 25.2° east of north
D 25.2° west of north
The answer is D. I get why it should be west of north, but how do we decide between answer B and D which is correct