Jason alone can complete a work in 20 days. In how many days can Jamal alone do the same work, if both of them together can do the same work in 9 days?
1
\(11\frac{4}{11}\) days
2
\(16\frac{4}{11}\) days
3
\(16\frac{16}{11}\) days
4
\(6\frac{4}{11}\) days