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				| 1. | In a 400 meters race, X beats Y by 40 meters, while in a 200 meters race, Y beats Z by 10 meters. X beats Y in a kilometer race by? | 
| A. | 100 meters | 
| B. | 125 meters | 
| C. | 140 meters | 
| D. | 145 meters | 
| Answer» E. | |