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Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively . If they cross each other in 23 seconds, what is the ratio of their speeds? | |
A. | Insufficient data [Wrong Answer] |
B. | 3 : 1 [Wrong Answer] |
C. | 1 : 3 [Wrong Answer] |
D. | 3 : 2 [Correct Answer] |