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      Question

      Average speed of β€˜A’ during a 24-hour journey is 32

      km/h. If he covered the first 120 km of his journey at a speed of 20 km/h, then find the speed at which β€˜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

      Solution

      Total distance covered by β€˜A’ = 24 Γ— 32 = 768 km Time taken to cover 120 km = 120/20 = 6 hours Time taken to cover remaining distance = 24 – 6 = 18 hours So, required speed = {(768 – 120)/18} = 36 km/h

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