Two trains are running in opposite directions in the same speed. The length of each train is 120 meter. If they cross each other in 4 seconds, the speed of each train (in km/hr) is
Choose the correct answer
A) 42  B) 36  C) 108  D) 120  E) 124
Explanation:   Distance covered = 120+120= 
<gadget id="calculator">120+120</gadget>
<output>240</output>
240 m   Time= 4 s   Let the speed of each train = v. Then relative speed = v+v = 2v   2v = distance/time = 240/4= 
<gadget id="calculator">240/4</gadget>
<output>60</output>
60 m/s   Speed of each train= v = 60/2= 
<gadget id="calculator">60/2</gadget>
<output>30</output>
30 m/s= 30×36/10 km/hr = 108 km/hr   Answer: Option 108
<result>C</result>
Two trains are running in opposite directions in the same speed. The length of each train is 120 meter. If they cross each other in 4 seconds, the speed of each train (in km/hr) is