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      Question

      R jogs at twice the speed of walking and runs at twice

      the speed of jogging. From his home to office, he covers half of the distance by walking and the rest by jogging. From his office to home, he covers half the distance jogging and the rest by running. What is his average speed (in km/h) in a complete round from his home to office and back home if the distance between his office and home is 10 km and he walks at the speed of 5 km/h?
      A 60/9 Correct Answer Incorrect Answer
      B 80/9 Correct Answer Incorrect Answer
      C 60/8 Correct Answer Incorrect Answer
      D 90/8 Correct Answer Incorrect Answer

      Solution

      The correct answer is B

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