1.

Two trains of length 100 m and 200 m are 100 m apart. They start moving towards each other on parallel tracks, at speeds 54 kmph and 72 kmph. After how much time will the trains meet?

A. 10/7 sec
B. 12/7 sec
C. 20/7 sec
D. 17/7 sec
Answer» D. 17/7 sec


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