Aplane can fly 260 miles downwind in the same amount of time as it can travel 190 miles upwind. find the velocity of the wind if the plane can fly 225 mph in still air.

recall your d = rt, distance = rate * time.

w = rate of the wind

225 = rate of the plane

so the plane flies 260 miles in say "t" hours, with the wind, now, the plane is not really going 225 mph fast, is really going "225 + w" fast because the wind is adding speed to it, likewise, when going against the wind, is not going 225 mph fast is going "225 - w" because the wind is eroding speed from it, and that was also covered in "t" hours

goog may be able to you find that answer