Mathematics, 16.07.2019 21:30 hsjsjsjdjjd

When a plane flies with the wind, it can travel 1980 miles in 4.5 hours. when the plane flies in the opposite direction, against the wind, it takes 5.5 hours to fly the same distance. find the velocity of the plane in still air and the average velocity of the wind.

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When a plane flies with the wind, it can travel 1980 miles in 4.5 hours. when the plane flies in the...