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Q: A and B can do a piece of work in 12 days. B and C in 15 days and C and A in 20 days. If A, B and C work together, they will completer the work in :

A. 5 days
B. $$ 7{5\over 6} \ days$$
C. 10 days
D. $$ 15 {2\over 3} \ days$$
Answer» D. $$ 15 {2\over 3} \ days$$


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