Two trains 110 meters and 140 meters long are running in the same direction with speeds of 102 km/hr, 66 km/hr. In how much time will the first train cross the second Options:  A) 22 sec  B) 25 sec  C) 27 sec  D) 23 sec  E) 30 sec
Explanation:   Relative speed of the trains = (102 - 66) km/hr = 36 km/hr   = (36Ã— 5/18) m/sec = 10 m/sec.   Time taken by the trains to cross each other   = Time taken to cover (110 + 140) m at 10 m /sec = (250/10)= 
<gadget id="calculator">(250/10)</gadget>
<output>25</output>
25 sec.   Answer: Option 25 sec
<result>B</result>
Two trains 110 meters and 140 meters long are running in the same direction with speeds of 102 km/hr, 66 km/hr. In how much time will the first train cross the second