Ravi and Mukesh can separately do a piece of work in 8 and 12 days respectively. How much time will it take to finish the whole work if they work alternatively while the work was started by Ravi?
1
\(4\frac{4}{5}\) days
2
\(9\frac{2}{5}\) days
3
\(4\frac{3}{5}\) days
4
\(9\frac{{1}}{2}\) days
5
None of these