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      Question

      A car travels at a speed of 40 km/h for 15 minutes and

      at a speed of 72 km/h for the next 5 minutes. The average speed of the car for the whole journey is:
      A 43 km/h Correct Answer Incorrect Answer
      B 41 km/h Correct Answer Incorrect Answer
      C 45 km/h Correct Answer Incorrect Answer
      D 48 km/h Correct Answer Incorrect Answer

      Solution

      The correct answer is D

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