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Q:

A and B can do a piece of work in 20 days and 12 days respectively. A started the work alone and then after 4 days B joined him till the completion of the work. How long did the work last?

  • 1
    6 days
  • 2
    10 days
  • 3
    15 days
  • 4
    20 days
  • Show Answer
  • Workspace

Answer : 2. "10 days"

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