Question

A and B can do a piece of work in 6 days. A alone can do it in 9 days. the time taken by B alone to do the work is

Answer 1

A and B in 6 days can do 1 work
A and B in 1 day can do 1/6 work
A in 9 days can do 1 work
A in 1 day can do. 1/9 work

B in 1 day can do. (1/6-1/9)
=(3/18-2/18)
=1/18 B alone can do the work in 1÷1/18 =18 days (Hope this helps you Please mark it as brainliest)