Two trains A and B start running together from the same point in the same direction at 60kmph and 72kmph respectively. If the length of each train is 240m. How long will it take for the train B to cross train A? A. 1min 24 sec B. 2min 24 sec C. 1 min 12sec D. None of these Answer Workspace Report Discuss Answer with explanation Answer: Option B Explanation Explanation: Relative speed =(72 -60)kmph = 12kmph = (12 x 5/18)m/sec = 10/3 m/sec Total distance covered =(240 +240)m =480m Required time =(480 x 3/10)sec = 144sec = 2min 24 sec. Workspace
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