vector problem

[DB]

a pilot maintains a heading due west with an airspeed of 240 km/h. After flying for 30 mins, he finds himself over a town that he knows is 150 km, W and 40 km, S of his starting point. What is the wind velocity at his altitude?

how do i tackle this? i just a push in the right direction

thanks

[DB]

btw i've drawn a diagram, i think the wind is pushing him NW, no?

[SN1987a]

Why do you think the wind's pushing NW? He ends up southward from where he started, so I'd say the wind's pushing SW.

What do you have on your vector diagram? How would you go about this question? Try starting from the basic principles everytime you have trouble figuring out a problem.