Working together tom and ricky can complete a piece of work in 6 days and working alone tom can complete same work in 10 days. how much time ricky takes

A and B together can complete a piece of work in 4 days. If A alone can complete the same work in 12 days, in how many days can B alone complete that work ?

1 man and 1 woman together can complete a piece of work in 8 days. A man alone can complete the work in 10 days. In how many days, can one woman alone complete the work?

A, B and C can complete a piece of work in 10, 20 and 60 days respectively. Working together they can complete the same work in how many days?

Working 5 hours a day. A can' complete a work in 8 days and working 6 hours a day, B can complete the same work in 10 days. Working 8 hours a day, they can jointly complete the work in

A alone can complete a piece of work in 6 days and B alone can complete the same piece of work in 12 days. In how many days can A and B together complete the same piece of work ?