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.  Choose the correct choice from the following answers
A) 12 sec  B) 24 sec  C) 48 sec  D) 60 sec  E) 50 sec
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 x6/125)= 24 sec.   Answer :24 sec
<result>B</result>
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.