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Q:

If a person travels a certain distance at a speed of 10 km/h, and returns through the same route at a speed of 20 km/h, then what will be the average speed during the whole journey?

  • 1
    $${{40\over3}}$$km/h
  • 2
    15 km/h
  • 3
    $${{10\over3}}$$km/h
  • 4
    $${{20\over3}}$$km/h
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Answer : 1. "$${{40\over3}}$$km/h "

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