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Q: It takes 12 hours for a sailor to cover a distance of 75 km in upstream while it takes only 7.5 hours to cover that distance in the downstream. What is the speed of the stream?
  • A. 6.625 km./hr.
  • B. 6.25 km./hr.
  • C. 8.125 km./hr.
  • D. 1.875 km./hr.
Correct Answer: Option D -
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Explanations:

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