Question

alone can finish a work a piece of work in 10 days and 15 days respectively if they work together how much of the work can finish in one day and how many days will it take to finish the work

Answer 1

If both work together, they will finish 1/10+1/15= 5/30 of the work.

So the whole work will be finished in 6 days.

A is doing 6/10 of the work in 6 days.