Two trains of length 90 m and 100 m are 200 m apart. They start moving towards each other on parallel tracks, at speeds 71 kmph and 89 kmph. After how much time will the trains meet?	Choose the correct option
A) 47/10 B) 46/10 C) 45/10 D) 42/10 E) 43/10
They are moving in opposite directions, relative speed is equal to the sum of their speeds.   Relative speed = (71 + 89)*5/18 = 44.4mps.   The time required = d/s = 200/44.4= 45/10 sec.   Answer:45/10
<result>C</result>
Two trains of length 90 m and 100 m are 200 m apart. They start moving towards each other on parallel tracks, at speeds 71 kmph and 89 kmph. After how much time will the trains meet?