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Q: A person covers 20 km with a speed of 12 km/hr and next 30 km with a speed of 20 km/h. What is his average speed for the whole journey in km/h (correct to one decimal place)?
  • A. 17.6
  • B. 16.4
  • C. 16.1
  • D. 17.2
Correct Answer: Option C -
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Explanations:

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