Question
Two trains 190 metres and 140 metres in length are
running towards each other on parallel tracks, one at the rate 60 km/hr and another at 48 km/hr. In how many seconds will they be clear of each other from the moment they meet?Solution
Required time = Sum of the lengths of trains / Relative speed Relative speed = 60 + 48 = 108 kmph = (108 × 5)/18 = 30 m/sec Required time = (190 + 140)/30 = 330/20 = 11 seconds
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