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1. |
A dog start chasing to a cat 2 hour later. It takes 2 hours to dog to catch the cat. If the speed of the dog is 30 km/h. what is the speed of cat? |
A. | 10 km/h |
B. | 12 km/h |
C. | 15 km/h |
D. | 20 km/h |
Answer» D. 20 km/h | |