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Q: A boy goes to School at a speed of 6 km/hr which is 4 km away from home and returns home at a speed of 12 km/hr. The average speed is :
  • A. 9 km/hr
  • B. 8 km/hr
  • C. 6 km/hr
  • D. 10 km/hr
Correct Answer: Option B -
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Explanations:

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