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      Question

      A woman travels at 60 km/h and is expected to reach her

      destination in 2 hours. However, after covering half the distance, she takes a 20-minute break. What speed must she maintain for the remaining journey to arrive on time?
      A 75 km/h Correct Answer Incorrect Answer
      B 80 km/h Correct Answer Incorrect Answer
      C 85 km/h Correct Answer Incorrect Answer
      D 90 km/h Correct Answer Incorrect Answer

      Solution

      Total distance = 60 Γ— 2 = 120 km
      Time for half the journey = (60 Γ· 60) Γ— 60 = 60 minutes
      Time remaining = 120 – 60 – 20 = 40 minutes
      Required speed = (60 Γ· 40) Γ— 60 = 90 km/h

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