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Q:

A travels 20 km with a speed of 40 km/hr. He travels another 45 km with a speed of 15 km/hr. what is his average speed for the entire journey?

  • 1
    16 km/hr.
  • 2
    22 km/hr.
  • 3
    18.5 km/hr.
  • 4
    21.3 km/hr.
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Answer : 3. "18.5 km/hr. "

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