insurence exam LIC HFL Junior Assistant Mock Tests 2024 Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes fill the cistern in 15 minutes and 12 minutes respectively. There is also a waste pipe in the cistern. When all the three are opened, the empty cistern is full in 20 minutes. How long will the waste pipe take to empty the full cistern?
1
5 minutes
2
10 minutes
3
15 minutes
4
20 minutes
5
12 minutes