A, B, and C can do the work in 81, 54, and 72 days, respectively. They started working together, but A left 8 days before the work was completed and C left 10 days before the work was completed. How long did it take to do the total work?
1
\(17{9\over29}\) days
2
\(27{19\over29}\) days
3
\(36{15\over17}\) days
4
\(16{14\over19}\) days
5
None of these