Two trains are approaching each other at 60 mph each. The length of each train is 1/6 miles. When the two locomotives(engines) meet, how many seconds will it take for them to pass each other completely?  Pick one.
A) 8 sec  B) 11 sec  C) 12 sec  D) 10 sec  E) 15 sec
total distance to cover= 2*(1/6)=2/6 miles   relative speed = 60+60= 
<gadget id="calculator">60+60</gadget>
<output>120</output>
120mph   time taken= (2/6)/120*3600= 
<gadget id="calculator">(2/6)/120*3600</gadget>
<output>10</output>
10 sec.   ANSWER:10 sec
<result>D</result>
Two trains are approaching each other at 60 mph each. The length of each train is 1/6 miles. When the two locomotives(engines) meet, how many seconds will it take for them to pass each other completely?