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1. |
How much time will a 420 m long train take to cross a man walking with a speed of 6 km/h in the direction of the moving train, if the speed of the train 42 km/hr? |
A. | 42 sec |
B. | 30 sec |
C. | 35 sec |
D. | 45 sec |
Answer» B. 30 sec | |