Two goods trains each 500 m long are running in opposite directions on parallel tracks. Their speeds are 50 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one?	Options:	A) 22	B) 27	C) 45	D) 99	E) 12
Relative speed = 50 + 30= 
<gadget id="calculator">50 + 30</gadget>
<output>80</output>
80 km/hr.   80 * 5/18= 200/9 m/sec.   Distance covered = 500 + 500= 
<gadget id="calculator">500 + 500</gadget>
<output>1_000</output>
1000 m.   Required time= 1000*9/200= 
<gadget id="calculator">1000*9/200</gadget>
<output>45</output>
45 sec.   Answer: 45
<result>C</result>
Two goods trains each 500 m long are running in opposite directions on parallel tracks. Their speeds are 50 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one?