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      Question

      A man travels some distance at a speed of 36 km/hr and

      returns at a speed of 27 km/hr. If the total time taken by him is 2 hrs 20 min, the distance is
      A 20 km Correct Answer Incorrect Answer
      B 36 km Correct Answer Incorrect Answer
      C 15 km Correct Answer Incorrect Answer
      D 24 km Correct Answer Incorrect Answer

      Solution

      Let the distance travelled by a man be D km According to the question, Total time taken = 2 hrs 20 min = 2(20/60) = 7/3 hours Total time = T1 + T2 D/36 + D/27 = 7/3 (3D + 4D)/108 = 7/3 7D/108 = 7/3 D = 36 km

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