Correct Answer: Option B
Relative speed = (45 + 30) km/hr
= (75 x (5/18) m/sec.
= (125/6) m/sec.
We have to find the time taken by the slower train to pass the DRIVER of the faster train and not the complete train.
So, distance covered = Length of the slower train.
Therefore, Distance covered = 500 m.
Therefore Required time =(500 x (6/125)) = 24 sec.
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