Two trains each 170m in length each, are running on two parallel lines in opposite directions. If one goes at the speed of 55km/h while the other travels at 50km/h. how long will it take for them to pass each other completely.	Select:
A) 15 sec
B) 11.6 sec
C) 31.6 sec
D) 12.6 sec
E) 23 sec
Explanation:   D = 170 m + 170 m = 340 m   RS = 55 + 50= 
<gadget id="calculator">55 + 50</gadget>
<output>105</output>
105 * 5/18= 146/5   T = 340 * 5/146 = 11.6 sec   Answer: Option 11.6 sec
<result>B</result>
Two trains each 170m in length each, are running on two parallel lines in opposite directions. If one goes at the speed of 55km/h while the other travels at 50km/h. how long will it take for them to pass each other completely.