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21 November, 06:58

Two trains of length 90m and120m

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  1. 21 November, 08:59
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    Answer:Train A is 90 m long and running at 72 km/h.

    Train B is 120 m long and running at 36 km/h.

    When the trains are running in opposite directions, their relative speed gets added: 72+36 = 108 km/h.

    The total length of A and B = 90+120 = 210 m

    So the time taken to cross each other = 210 m*60*60/108*1000m

    = 7 seconds
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