A) 8 km
B) 12 km
C) 6 km
D) Cannot be determined
Correct Answer: D
Solution :
| [d] Let the distance between M and N and the speed of current in still water be d km and x km/h, respectively. According to the question, \[\frac{d}{4+x}+\frac{d}{4-x}=3\] in the above equation, we have variables, hence cannot be determined. |
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