railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Work Efficiency
X and Y can complete a work in 9 days and 36 days, respectively. X begins to do the work and they work alternately one at a time for one day each. The whole work will be complete in:
1
\(12 \frac{1}{2} \text { days } \)
2
\(14 \frac{1}{4} \text { days } \)
3
\(13 \frac{1}{3} \text { days } \)
4
\(15 \frac{1}{5} \text { days }\)