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1. |
Q: A man whose speed is 4.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 kmph, find his average speed for the total journey ? |
A. | 5 kmph |
B. | 7 kmph |
C. | 3 kmph |
D. | 4 kmph |
Answer» E. | |