As can be seen from the title, A's work efficiency is one ninth and B is one twelfth.

One ninth+one ninth+one twelfth+one twelfth = 108 42 = 54 2 1 = 18 7.

Find a complete set

The total amount is 1

1-65438+7 in 2008 = 65438+ 1 in 2008.

Two 65438+7 08 = 18 14 = 7 9.

I have been here for eight days,

1- 7/9 = 2/9

Two nineties equals two nineties, which happened to be made in A, so it took another two days.

So a * * * takes 2+8= 10 days.

You can ask me if you don't understand, and I hope it can be adopted.