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Q:

A boy rides his bicycle 10 km at an average speed of 12 km/hr and again travels 12 km at an average speed of 10 km/hr. His average speed for the entire trip is approximate: 

  • 1
    10.4 km / hr
  • 2
    10.8 km / hr
  • 3
    11.0 km / hr
  • 4
    12.2 km / hr
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Answer : 2. "10.8 km / hr "

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