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      Question

      A bus covers some distance at a certain speed. If a

      person covers one-third of that distance in triple time, then the ratio of the speed of the person to the speed of the bus is:
      A 1:4 Correct Answer Incorrect Answer
      B 1:9 Correct Answer Incorrect Answer
      C 4:5 Correct Answer Incorrect Answer
      D 9:1 Correct Answer Incorrect Answer

      Solution

      Let the total distance be 12 km and speed be 12 km/hr Time taken to cover 12 km with the speed of 12 km/hr = 1 hr According to the question New distance = 12/3 = 4 km New time = 3 × 1 = 3 hrs New speed = 4/3 km/hr ∴ Ratio of new speed to original speed = 4/3:12 = 1:9

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