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      Question

      Average speed of ‘A’ during a 24-hour journey is 40

      km/h. If he covered the first 150 km of his journey at a speed of 25 km/h, then find the speed at which ‘A’ travelled during the remaining journey.
      A 40 km/h Correct Answer Incorrect Answer
      B 51 km/h Correct Answer Incorrect Answer
      C 45 km/h Correct Answer Incorrect Answer
      D 36 km/h Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Total distance covered by ‘A’ = 24 × 40 = 960 km Time taken to cover 150 km = 150/25 = 6 hours Time taken to cover remaining distance = 24 – 6 = 18 hours So, required speed = {(960 – 150)/18} = 45 km/h

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