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Q:

A can do a piece of work in 15 days. B is 25% more efficient than A, and C is 40% more efficient than B. A and C work together for 3 days and then C leaves. A and B together will complete the work in:

  • 1
    3 days
  • 2
    $$2{1\over 2} days$$
  • 3
    4 days
  • 4
    $$3{1\over 2} days$$
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Answer : 1. "3 days "

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