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 and C work together, they will complete the work in?
A. 5 days
B. days
C. 10 days
D. days
Answer:C
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 and C work together, they will complete the work in?
A. 5 days B. days C. 10 days D. days