Two train each 500 m long, and 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.  Answers:  A) 20 sec  B) 25 sec  C) 24 sec  D) 30 sec  E) 22 sec
speed = (45+30)= 
<gadget id="calculator">(45+30)</gadget>
<output>75</output>
75*5/18==&gt;125/6   req time = 500*6/125= 
<gadget id="calculator">500*6/125</gadget>
<output>24</output>
24 sec   ANSWER 24 sec
<result>C</result>
Two train each 500 m long, and 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.