A and B together can do a work in 8 days, B and C together in 6 days, while C and A together in 10 days, if they all work together, then the work will be completed in :
[A] 4\tfrac{4}{9}days
[B] 3\tfrac{3}{4}days
[C] 5\tfrac{5}{47}days
[D] 3\tfrac{3}{7}days

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