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:
A) 12 sec
B) 24 sec
C) 48 sec
D) 60 sec
E) None
Solution   Relative speed	= (45 + 30 )km/hr   = (75 x 5/18)m/sec   =(125 / 6) m/sec   Total Distance covered	= (500 + 500)= 
<gadget id="calculator">(500 + 500)</gadget>
<output>1_000</output>
1000 m   Required time= (1000 x 6 /125)sec   = 48 sec   Answer 48 sec
<result>C</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.