SOLUTION: A jet flies between two major cities at a rate of 400 miles per hour. On the return trip, there is a strong tail-wind and the plane makes the trip in two-thirds of the original tim

Question 964999: A jet flies between two major cities at a rate of 400 miles per hour. On the return trip, there is a strong tail-wind and the plane makes the trip in two-thirds of the original time. What is the average speed for the round trip?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A jet flies between two major cities at a rate of 400 miles per hour. On the return trip, there is a strong tail-wind and the plane makes the trip in two-thirds of the original time. What is the average speed for the round trip?
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The speed with the tail wind is 400/(2/3) = 600 mi/hr
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Avg speed = 2*400*600/(400+600) = 480 mi/hr

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