rlbond86

Oh come on guys it's an algebra question.

(a) Plane's speed + wind = 4200 / 3 = 1400
(b) Plane's speed - wind = 4200 / 4 = 1050

subtract (b) from (a)

2 * wind = 1400 - 1050 = 350
wind = 175

back to (a)

plane's speed + wind = plane's speed + 175 = 4200 / 3 = 1400
plane's speed = 1400 - 175 = 1225
C


Yes we can say that the drag force would be proportional to the velocity, that planes don't actually go straight, but in great circles, that the drag would decrease as altitude increases, and get a not-so-nice differential equation. But the guy did want an answer.

Oh, and don't forget relativity!