Two trains are running in opposite directions with the same speed. If the length of each train is 240 m and they cross each other in 12 sec, then the speed of each train is?  Choose the correct choice from the following:
A) 72
B) 89
C) 36
D) 34
E) 23
Let the speed of each train be x m/sec.   Then, relative speed of the two trains = 2x m/sec.   So, 2x = (240 + 240)/12 =&gt; x = 20   Speed of each train = 20 m/sec.   = 20 * 18/5= 
<gadget id="calculator">20 * 18/5</gadget>
<output>72</output>
72 km/hr.   72nswer: Option 72
<result>A</result>
Two trains are running in opposite directions with the same speed. If the length of each train is 240 m and they cross each other in 12 sec, then the speed of each train is?