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Two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is ?

Correct Answer: 48 sec

Explanation:

Relative speed = 60 + 90 = 150 km/hr.


= 150 x 5/18 = 125/3 m/sec.


Distance covered = 1.10 + 0.9 = 2 km = 2000 m.


Required time = 2000 x 3/125 = 48 sec.


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