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      Question

      Rafique had to cover 540 km in 24 hours. He covered the

      first 350 km at an average speed of 25 km/h. What should be Rafique's average speed for the rest of the journey so that he reaches on time?
      A 20.5 km/h Correct Answer Incorrect Answer
      B 20 km/h Correct Answer Incorrect Answer
      C 18 km/h Correct Answer Incorrect Answer
      D 19 km/h Correct Answer Incorrect Answer

      Solution

      Time taken to cover first 350 km at an average speed of 25 km/h = 350/25 = 14 hrs Now, we have remaining time = (24 - 14) hrs = 10 hrs Remaining distance = (540 - 350) km = 190 km Rafique's average speed for the rest of the journey = 190/10 = 19 km/hr

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