SOLUTION: When a plane flies with the wind, it can travel 840 miles in 2 hours. When the plane flies in the opposite direction, against the wind, it takes 5 hours to fly the same di
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Question 1158750: When a plane flies with the wind, it can travel 840 miles in 2 hours. When the plane flies in the opposite direction, against the wind, it takes 5 hours to fly the same distance. Find the rate of the plane in still air and the rate of the wind.
Answer by VFBundy(438) (Show Source): You can put this solution on YOUR website!
With the wind:
Distance = 840
Rate = d/t = 420
Time = 2
Against the wind:
Distance = 840
Rate = d/t = 168
Time = 5
Let s = rate in still air
Let w = speed of wind
s + w = 420
s - w = 168
2s = 588
s = 294
If s = 294, and s + w = 420, then w = 126
s = rate in still air = 294
w = speed of wind = 126
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