Two goods train each 500 m long, are running in opposite directions on parallel tracks. Their speeds are 45 km /hr and 30 km/hr respectively Find the time taken by the slower train to pass the driver of the faster one.

12 sec

24 sec

48 sec

60 sec

Relative speed = (45 + 30 )km/hr = (75 x 5/18)m/sec =(125 / 6) m/sec Total Distance covered = (500 + 500) m = 1000 m Required time = (1000 x 6 /125)sec = 48 sec

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