Two trains are running in opposite directions with the same speed. If the length of each train is 120 m and they cross each other in 12 sec, then the speed of each train is?  Select the correct option:
A) 64 km/hr.
B) 96 km/hr.
C) 78 km/hr.
D) 42 km/hr.
E) 36 km/hr.
Let the speed of each train be x m/sec.   Then, relative speed of the two trains = 2x m/sec.   So, 2x = (120 + 120)/12 =&gt; x = 10   Speed of each train = 10 m/sec.   = 10 * 18/5= 
<gadget id="calculator">10 * 18/5</gadget>
<output>36</output>
36 km/hr.   ANSW36 km/hr.R:36 km/hr.
<result>E</result>
Two trains are running in opposite directions with the same speed. If the length of each train is 120 m and they cross each other in 12 sec, then the speed of each train is?