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. Select the correct option.
A) 12 sec	B) 24 sec	C) 48 sec	D) 60 sec	E) 65 sec
Explanation:   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.   Required time =500 x	6/125 = 24 sec.   ANSWER IS 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.