Two trains are running in opposite directions with the same speed. If the length of each train is 150 m and they cross each other in 12 sec, then the speed of each train is?
Answers:
A) 30
B) 35
C) 45
D) 37
E) 38
Let the speed of each train be x m/sec.   Then, relative speed of the two trains = 2x m/sec.   So, 2x = (150 + 150)/12 =&gt; x = 12.5   Speed of each train = 10 m/sec.   = 12.5 * 18/5= 
<gadget id="calculator">12.5 * 18/5</gadget>
<output>45</output>
45 km/hr.   Answer: Option 45
<result>C</result>
Two trains are running in opposite directions with the same speed. If the length of each train is 150 m and they cross each other in 12 sec, then the speed of each train is?