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      Question

      If a bus travel 20 km in 15 minute then how much time

      take if speed is decrease by 20 km/h?
      A 15 min Correct Answer Incorrect Answer
      B 20 min Correct Answer Incorrect Answer
      C 22 min Correct Answer Incorrect Answer
      D 19 min Correct Answer Incorrect Answer
      E 26 min Correct Answer Incorrect Answer

      Solution

      Distance covered in 15 minutes = 20 km.  So the speed of the bus = (20/15) × 60 = 80 km/hr  Reduced speed = (80 – 20) km/hr = 60 km/hr  Time taken to cover 20 km = (60/60) × 20 = 20 min

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