Two men X and Y working together, completed a job in 6 days. If X had worked thrice as efficiently as he actually worked and Y had worked one-fourth as efficiently as he actually worked, the work would have been completed in 4 days. In how many days X alone could complete the work?
1
\(13 \frac{1}{5} \) days
2
8 \(1 \over2\) days
3
9 \(1 \over3\) days
4
10 \(1 \over5\) days