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1. |
The speed of a boat in still water is 8 km/hr. If it can travel 20 km down stream at -the same time as it can travel 12 km upstream, the rate of stream (in km/hr) is ? |
A. | 2 |
B. | 1 |
C. | 4 |
D. | 3 |
Answer» B. 1 | |