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1. |
A boat travels 24 km upstream in 6 h and 20 km downstream in 4 h. then, the speed of a boat in still water and the speed of current are respectively |
A. | 4.5 km/h and 3 km/h |
B. | 4.5 km/h and 0.5 km/h |
C. | 4 km/h and 2 km/h 5 km/h and 2 km/h |
D. | 5 km/h and 2 km/h |
Answer» C. 4 km/h and 2 km/h 5 km/h and 2 km/h | |