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 answers:  A) 11  B) 72  C) 36  D) 99  E) 27
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.   Answer: 72
<result>B</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?