1.

 Two trains starting at thesame time from two stations 200 kmapart and going in opposite directions cross each other at a distance of 110 km from one of the stations. What isthe ratio of their speeds?

A. 9 : 11
B. 11 : 9
C. 9 : 17
D. 17 : 9
Answer» C. 9 : 17


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