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Q: A boat covers a certain distance downstream in 4 hours and returns upstream 6 hours. If the speed of the boat in still water is 30 km/h, then what is the speed of the current in km/h?
  • A. 4
  • B. 5
  • C. 6
  • D. 3.5
Correct Answer: Option C -
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Explanations:

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