defence exam CRPF Head Constable Ministerial & ASI 2022 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes A and B can fill a tank in 8 h and 12 h respectively. A waste pipe C can empty the tank in 4 h. A and B are kept open for 2 h, then C is also opened. Then the tank will empty in
1
5 h
2
6 h
3
7 h
4
10 h