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      Question

      A train covers 120 km at a speed of 30 km/hr, then 180

      km at 60 km/hr, and finally 240 km at 120 km/hr. Find the average speed of the train for the entire journey.
      A 68 km/hr Correct Answer Incorrect Answer
      B 58 km/hr Correct Answer Incorrect Answer
      C 60 km/hr Correct Answer Incorrect Answer
      D 65 km/hr Correct Answer Incorrect Answer

      Solution

      The correct answer is C

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