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1. |
Two trains starting at the same time from two stations 200 km apart and going in opposite directions cross each other at a distance of 110 km from one of the stations. What is the ratio of their speed |
A. | 9 : 20 |
B. | 11 : 9 |
C. | 11 : 20 |
D. | None of these |
Answer» C. 11 : 20 | |