A and B can do a work in 2 days, B and C in 4 days and C and A in 6 days. In how many days will the work be completed, if all three of them work together?  Choose the correct choice: A) 10/12 B) 16/28 C) 24/11 D) 42/16 E) 18/12
One day work of A and B = 1/2   One day work of B and C = 1/4   One day work of C and A = 1/6   2(A + B + C) = 1/2 + 1/4 + 1/6.   2(A + B + C) = 11/12   (A + B + C) = 11/24   Number of days required = 24/11 days.   Answer: 24/11
<result>C</result>
A and B can do a work in 2 days, B and C in 4 days and C and A in 6 days. In how many days will the work be completed, if all three of them work together?