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      Question

      A train takes 30 minutes to travel 20 km, but due to

      maintenance, its speed is reduced by 25% for the next 10 km. Find the total time taken by the train to cover 30 km.
      A 45 minutes Correct Answer Incorrect Answer
      B 50 minutes Correct Answer Incorrect Answer
      C 50 minutes Correct Answer Incorrect Answer
      D 60 minutes Correct Answer Incorrect Answer

      Solution

      Speed = 20/0.5 = 40 km/h New speed = 40 × 0.75 = 30 km/h Time = 10/30 = 1/3 hour = 20 minutes Total time = 30 + 20 = 50 minutes Answer: b) 50 minutes

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