A can do a piece of work in 72 days. He works at it for 9 days and then B alone finishes the remaining work in 42 days. In how many days will A and B working together, finish the same work?
1
\(28\frac{4}{5}\)
2
\(27\frac{3}{5}\)
3
\(26\frac{2}{5}\)
4
\(25\frac{1}{5}\)