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    • Question

      A truck travels at a speed of 60 km/h from city P to

      city Q and returns to city P by the same route at a speed of 100 km/h. What is the average speed of the truck for the given journey?
      A 85 km/h Correct Answer Incorrect Answer
      B 80 km/h Correct Answer Incorrect Answer
      C 75 km/h Correct Answer Incorrect Answer
      D 70 km/h Correct Answer Incorrect Answer

      Solution

      The truck travels from P to Q at 60 km/h and returns at 100 km/h.

      Using the average speed formula for two equal distances:

      Substituting a=60 and b=100:

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