A and B can do a piece of work in 10 days; B and C can do the same work in 20 days; and C and A can do the work in 10 days. In how many days will A,B and C finish the work together?
(A) 8 days
(B) 4 days
(C) 10 days
(D) 6 days
Correct Answer : (A) 8 days
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