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1. |
A boat rows downstream covers a distance of 20 km in 2 hrs while it covers the same distance upstream in 5 hrs. Then speed of the boat in still water is : |
A. | 9 km/ hr |
B. | 10 km/ hr |
C. | 7 km/ hr |
D. | 8 km/ hr |
Answer» D. 8 km/ hr | |