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1. |
Q: A 400-metre-long train is running at the speed of 60 km/hour. A man is running in the opposite direction of train at the speed of 12 km/hour. In how much time the train will cross this man? |
A. | 50 second |
B. | 30 second |
C. | 20 second |
D. | 40 second |
Answer» D. 40 second | |