Question
Two trains 190 metres and 160 metres in length are
running towards each other on parallel tracks, one at the rate 70 km/hr and another at 56 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 = 70 + 56 = 126 kmph = (126 × 5)/18 = 35 m/sec Required time = (190 + 160)/35 = 350/35 = 10 seconds
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