Rohan can alone finish a work in 12 days and Hari can alone in 16 days. They both work for 3 days and then Rohan left. After that only Hari works and finishes the work. The total work will be completed in:
1
9 days
2
\(12\frac{1}{3}\) days
3
12 days
4
\(12\frac{2}{3}\) days