Time a plane leaves the other

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Two cities are 3950 miles apart. A plane leaves one of them, traveling towards the other at an average speed of 390 miles per hour. At the same time a plane leaves the other, traveling towards the first, at an average speed of 400miles per hour. How long will it take them to meet?

Reference no: EM131114994

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Time a plane leaves the other : Two cities are 3950 miles apart. A plane leaves one of them, traveling towards the other at an average speed of 390 miles per hour. At the same time a plane leaves the other, traveling towards the first, at an average speed of 400miles per hour. H..
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