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      Question

      A car travels 150 km at a speed of 50 km/h and then 180

      km at a speed of 60 km/h. Find the total time taken and the average speed for the whole journey.
      A 6 hrs and 55 km/h Correct Answer Incorrect Answer
      B 7 hrs and 85 km/h Correct Answer Incorrect Answer
      C 9 hrs and 50 km/h Correct Answer Incorrect Answer
      D 2 hrs and 45 km/h Correct Answer Incorrect Answer

      Solution

      Time for first part = 150 / 50 = 3 hours Time for second part = 180 / 60 = 3 hours Total time = 3 + 3 = 6 hours Total distance = 150 + 180 = 330 km Average speed = Total distance / Total time = 330 / 6 = 55 km/h Answer: Total time = 6 hours, Average speed = 55 km/h

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