How Long did the Work Last? If

A can complete a work in 10 days, B in 12 days, and  C in 15 days. All of them began the work together, but A had to leave the work after 2 days of the start and B 3 days before the completion of the work. How long did the work last?

  1. 6 days
  2. 5 days
  3. 7 days
  4. 9 days
Desire Adnan Default Asked on 3rd August 2015 in Maths.
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