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Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is: ?->(Show Answer!)
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1. Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is:





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  • By: guest on 01 Jun 2017 05.48 pm
    Relative speed = (60 + 40) km/hr = 100 x 5 m/sec = 250 m/sec. 18 9 Distance covered in crossing each other = (140 + 160) m = 300 m. Required time = 300 x 9 sec = 54 sec = 10.8 sec. 250 5
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