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Two trains are moving in opposite directions @ 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:


48 sec 

distance covered= (1.10+0.9)km=2km=2000
required time =2000×3/125 sec =48sec.
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