insurence exam LIC HFL Junior Assistant Mock Tests 2024 Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes P and Q can fill an empty tank in 15 min and 45 min respectively. R can empty a full tank in 30 minutes. If all three are opened together, how much time will they take to empty/fill the tank?
1
18 min
2
60 min
3
30 min
4
20 min
5
None