Civil Services TNPSC Group 1 (New Syllabus) Mock Test 2025 Quantitative Aptitude Time and Work Work Efficiency
X alone can finish a work in 18 days, Y alone can finish the same work in 9 days. If X, Y and Z together can finish the same work in 4 days, then in how many days Z alone can finish the work?
1
12 days
2
10 days
3
14 days
4
16 days