A and B together complete a work in 12 day. With the help of C, they complete the work in 6 days. Ratio of efficiency of A and B is 3:1. If C complete the work alone in [R + 8] days find in how many days A alone complete the work?
1
R + 8
2
R + 16
3
R + 12
4
R + 10
5
R + 14