Question

A and B working together can do a piece of work in 6 days. B alone can do this in 8 days.Supposing B works at it for 5 days. In how many days A alone can finish it​

Answer 1

in 1 day A can do 1/6 of the work

in 1 day B can do 1/8 of the work

in 1 day they together can do (1/6)+(1/8)= (4+3)/24= 7/24

to complete the work together they need 1÷(7/24)= 3 days and 3/7 of a day...