A, B and C can complete a piece of work separately in 10, 20 and 40 days, respectively. In how many days will the work be completed if A is assisted by both B and C every third day?
A. $$8\frac{2}{7}$$
B. 9
C. $$10\frac{2}{3}$$
D. 6
Answer: Option A
This Question Belongs to Arithmetic Ability >> Time And Work
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