Two trains each 475 m long are running in opposite directions on parallel tracks. Their speeds are 55 km/hr and 40 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) 77 sec
B) 66 sec
C) 48 sec
D) 36 sec
E) 45 sec
Relative speed = 55+40= 
<gadget id="calculator">55+40</gadget>
<output>95</output>
95 km/hr.   95 * 5/18= 475/18 m/sec.   Distance covered = 475 + 475= 
<gadget id="calculator">475 + 475</gadget>
<output>950</output>
950 m.   Required time= 950 * 18/475= 
<gadget id="calculator">950 * 18/475</gadget>
<output>36</output>
36 sec.   Answer: 36 sec
<result>D</result>
Two trains each 475 m long are running in opposite directions on parallel tracks. Their speeds are 55 km/hr and 40 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one?