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1. |
A person goes from A to B with a speed of 30 km/h. He comes back from B to A with a speed of 20 km/h. What is his average speed for the entire journey? |
A. | 27.5 km/h |
B. | 26.5 km/h |
C. | 25 km/h |
D. | 24 km/h |
Answer» E. | |