1.

The speed of a boat in still water is 15 km/h. The speed of the current is 3 km/h. In how much time (in hours) will the boat travel a distance of 54 km upstream and the same distance downstream?

A. \(7\frac{1}{2}\)
B. 7
C. 6
D. \(6\frac{1}{2}\)
Answer» B. 7


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