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Answer : 4 162 sec Explanation : Answer: D) 162 sec Explanation: Given two trains of length = 180 mts 180 mts The distance is = Length of trains = 360 mts Speed = 58 - 50 = 8 kmph x 5/18 m/sThen, Time = dis/speed = (360x18) / (8x5) = 162 sec.

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