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Q:

 A can do a piece of work alone in 30 days. B is 25% less efficient than A, while C is $$33{1\over 3}$$ % more efficient than B. In how many days can A, B and C, working together, complete the work?

  • 1
    $${150\over 11}$$ days
  • 2
    $${120\over 11}$$ days
  • 3
    $${140\over 11}$$ days
  • 4
    $${130\over 11}$$ days
  • Show Answer
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Answer : 2. "$${120\over 11}$$ days"

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