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Thread: A fun Questions about trains
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[quote=LINGYUXISU,432470]The past time (used time) is unknown when the two trains meet, so let's assume it an X. So we could calculate it this way: 100X + 250X = 303, so X=303/350, right? Then the Train A leaving from Shanghai will go this long when they meet, 303/350x100, which means it is 303/350x100 kilometers away from shanghai. Train B leaving from Nanjing will go this long when they meet: 303/350x250 and it is 303-303/350x250 kilometers away from Shanghai. You just compare to see which one is closer to Shanghai. Am I right?[/quote]
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