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An airplane is flying at 120km/h due west moves into a region where the wind is blowing at 40km/h. If the planes original velocity is Vplane, what is the expression for the plane's resulting velocity in terms of V plane?

Answers are given 1/3 greater than Vplane
2/3 greater than Vplane
1 v Plane
80Vplane

I think it is 80vplane because you have to subtract the two velocitiesbit a friend of mine doing the same problem said it was 2/3 greater than vplane-I don't think is correct

3 answers

It depends on which way the wind is blowing. If it is blowing East, the Vplane is 80, or 2/3 V
If the wind is blowing with the plane, the resultane velocity is 160, or 1/3 greater than Vp
So is the answer ever 2/3 greater than V plane or just 2/3 V-
Forgot to say the wind is due east while the plane is traveling due west