Train A crosses a car moving at 30 kmph in opposite direction in 14.4 seconds. If train A and B can cross a man standing on a platform in 21.6 seconds and 15 seconds respectively and the length of train B is 60 m less than that of train A, then what is the time taken by train A to cross train B running in the same direction?
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the right answer is 12.4 second
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