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Q: A man's speed in the downstream in 15 km/hr. and the speed of the stream is 2.5 km/hr. Find his speed upstream.
  • A. 10 km./hr.
  • B. 9 km./hr.
  • C. 12.5 km./hr.
  • D. 8.5 km./hr.
Correct Answer: Option A -
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Explanations:

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