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 8 seconds, the speed of each train (in km/hr) is Choices:
A) 42
B) 36
C) 28
D) 20
E) 54
Explanation:   Distance covered = 120+120= 
<gadget id="calculator">120+120</gadget>
<output>240</output>
240 m   Time= 12 s   Let the speed of each train = v. Then relative speed = v+v = 2v   2v = distance/time = 240/8= 
<gadget id="calculator">240/8</gadget>
<output>30</output>
30 m/s   Speed of each train= v = 30/2= 
<gadget id="calculator">30/2</gadget>
<output>15</output>
15 m/s= 15×36/10 km/hr = 54 km/hr   Answer: Option 54
<result>E</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 8 seconds, the speed of each train (in km/hr) is