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?
Answer with explanationAnswer: Option B
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.
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