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Answer : 2 36 sec Explanation : Answer: B) 36 sec Explanation: Time taken to meet the first time = length of track/relative speed Given the length of the track is 600 m The relative speed = 25 35 = 60 kmph = 60 x 5/18 m Therefore Time = 60025 35518= 600/60 x (18/5) = 36 sec.

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