[" 1.A can do a piece of work in "24" days "],[" while B can do it in "30" days.In how "],[" many days can they complete it,if they "],[" work together? "]

Rajan can do a piece of work in 24 days while Amit can do it in 30 days. In how many days can they complete it they work together?

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 a piece of work in 8 days, B can do it in 16 days, while C can do it in 80 days. In how many days they can complete the whole work, working together?

A can do a piece of work in 10 days, B can do it in 12 days and C can do it in 15 days. In how many days they can complete the work, working together?

A and B together can do a piece of work in 12 days, while B alone can finish it in 30 days. In how many days can A alone finish the work?

A can do a work in x days while B can do the same work in y days then in how many days will they complete the work, working together?