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839 - Math - Problem Solving

Math - Problem Solving MCQ No. : 31123

Question: X alone can do a piece of work in 15 days and Y alone can do it in 10 days. X and Y undertook to do it for Rs. 720. With the help of Z they finished it in 5 days. How much is paid to Z?

  1. Rs. 360
  2. Rs. 120
  3. Rs. 240
  4. Rs. 300

Correct Answer: B

Explanation:

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