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Q:

The ratio of the efficiencies of A. B and C is 7: 5: 4. Working together, they can finish a work in 35 days. A and B work together for 28 days. The remaining work will be completed (in days) by C alone:

  • 1
    60
  • 2
    63
  • 3
    56
  • 4
    49
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Answer : 3. "56"

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