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Two goods trains each 520 m long, are running in opposite directions on parallel tracks. Their speeds are 42 km/hr and 36 km/hr respectively. Find the time taken by the slower train to cross the driver of the faster one ?

Correct Answer: 48 sec

Explanation:

Relative speed = 42 + 36 = 78 km/hr = 65 3  m/s


Distance = (520 + 520) =1040 mts.


Time =  1040 × 3 65 = 48 sec


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