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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 | |