A can do a piece of work in 14 days while B can do it in 21 days. They began together and worked at it for 6 days. Then A fell ill and B had to complete the remaining work alone. In how many days was the work completed?

A can do a piece of work in 14 days while B can do it in 21 days. In how many days, working together they will complete the whole work?

A can do a piece of work in 14 days while B can do it in 28 days. In how many days, working together will they complete the whole work?

A can do 2/5 of a work in 12 days while B can do 66^(2/3)% of the same work in 16 days. They work together for 10 days. B alone will complete the remaining work in

A can do a piece of work in 15 days and B alone can do it in 10 days. B works at it for 5 days and then leaves. In how many days, A alone can finish the remaining work?

(A + B) can do a piece of work in 12 days. (B + C) can do same work in 6(2)/(3) days. A work for 3 days, B works for 4 days and C completed the remaining work in 7 days. In how many days will A, B and C do this work alone ?