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1. |
A walks at 4 km/ph and 4 hours after his start, B cycles after him at 10 km/ph. How far from the start does B catch up with A? |
A. | 16.7 km |
B. | 18.6 km |
C. | 21.5 km |
D. | 26.7 km |
Answer» E. | |