Teaching Railway Teacher PRT 2025 Mock Test Series Quantitative Aptitude Time and Work Pipe and Cistern
Pipes X, Y and Z can fill the reservoir in 8 hours. After working on it for 2 hours together, Z is closed and X and Y can fill the remaining part in 12 hours. How much time will Z take to fill the reservoir?
1
25 hours
2
10 hours
3
21 hours
4
16 hours