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QUESTION
Two cities are 2 7 2 0 miles apart. A plane leaves one of them, traveling towards the other at an average speed of 3 0 0 miles per hour.
Two cities are 2720 miles apart. A plane leaves one of them, traveling towards the other at an average speed of 300 miles per hour. At the same time a plane leaves the other, traveling towards the first, at an average speed of 380 miles per hour. How long will it take them to meet?
