Question
Two trains of lengths 140 m and 160 m are moving in
opposite directions at speeds of 54 km/h and 36 km/h respectively. How much time will they take to cross each other?Solution
Total length = 140 + 160 = 300 m Relative speed = 54 + 36 = 90 km/h = 90 x 5/18 = 25 m/s Time = Distance / Speed = 300 / 25 = 12 seconds
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