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      Question

      Changu & Mangu can do a work in 20 & 30 days. Both

      together start the work. After some days Changu left the work. The rest work done by Mangu in 10 days. After how many days Changu left the work.
      A 4 days Correct Answer Incorrect Answer
      B 6 days Correct Answer Incorrect Answer
      C 8 days Correct Answer Incorrect Answer
      D 2 days Correct Answer Incorrect Answer

      Solution

      The correct answer is C

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