1.

A and B can do a work in 12 days , B and C in 15 days, C and A in 20 days. if A,B,C work together , they will complete the work in _____________

A. 10 DAYS
B. 5 DAYS
C. 47/3 DAYS
D. 47/6 DAYS
Answer» B. 5 DAYS


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