Working together, A and B can do a job in 6 days. B and C can do the same job in 10 days, while C and A can do it in 7.5 days. How long will it take if all A, B and C work together to complete the job?

Working together, A and B can do a job in 6 days. B and C can do the s

1.	Working together, A and B can do a job in 6 days. B and C can do the same job in 10 days, while C and A can do it in 7.5 days. How long will it take if all A, B and C work together to complete the job?
A.	4 days
B.	3 days
C.	6 days
D.	5 days
E.	None of these
Answer» E. None of these

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