engineering recuitment OPSC Assistant Industries Officer Mock Test 2025 Quantitative Aptitude Time and Work Pipe and Cistern
Pipe first can fill a tank in 12 hours and pipe second can fill tank in 15 hours. Both the pipes are opened alternatively for an hour and start with pipe second, but after 4 hours, pipe first is closed. How many hours will be taken to fill the tank?
1
15.5 hours
2
11.5 hours
3
14.5 hours
4
10.5 hours