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Q: A boat covers a distance of 12 km. The distance of first 4 km in the downstream is covered in 15 minutes. The next 8 km is travelled in upstream. The speed of the boat in the downstream is twice the speed of the boat in the upstream. Find the average speed of journey.
  • A. 11.6 km./hr.
  • B. 9.6 km./hr.
  • C. 10 km./hr.
  • D. 10.4 km./hr.
Correct Answer: Option B -
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Explanations:

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