state gov Bihar Police Constable (सिपाही) Mock Test Series 2025 Quantitative Aptitude Time and Work Work Efficiency
Pipes A and B can empty a full tank in 15 minutes and 20 minutes, respectively, while pipe C alone can fill the empty tank in 8 minutes. If pipes A, B and C are opened together, then in how many hours will the tank be filled?
1
2.5
2
1.5
3
2
4
3