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Q: A boat's speed in still water is 20 km/hr. If the boat covers a distance of 20 km in the upstream in 4 hours, find the speed of the current.
  • A. 20 km/hr
  • B. 15 km/hr
  • C. 25 km/hr
  • D. 30 km/hr
Correct Answer: Option B -
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Explanations:

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