BANK SBI PO Mock Test Series 2025 (Pre + Mains) Quantitative Aptitude Time and Work Pipe and Cistern
A tank of capacity 60 litres can be filled in 10 minutes by a pipe P. Another pipe Q placed at the bottom of tank can empty the tank in 30 minutes. Both of the pipes were opened. In how much time pipe Q will empty the tank if pipe P is closed after 10 minutes?
1
11 minutes
2
12 minutes
3
13 minutes
4
9 minutes
5
None of these