1.

X and Y are two stations which are 280 km apart. A train starts at a certain time from X and travels towards Y at 60 km/h. After 2 hours, another train starts from Y and travels towards X at 20 km/h. After how many hours does the train leaving from X meets the train which left from Y?_x005F_x000D_

A. 2 hours
B. 6 hours
C. 3 hours
D. 4 hours
Answer» E.


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