Question
Two trains 110 metres and 100 metres in length are
running towards each other on parallel tracks, one at the rate 75 km/hr and another at 51 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 = 75 + 51 = 126 kmph = (126 × 5)/18 = 35 m/sec Required time = (110 + 100)/35 = 110/35 = 6 seconds
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