engineering recuitment FCI JE 2022 Mock Test for CE/ME/EE (Phase I & II) Quantitative Aptitude Time and Work Pipe and Cistern
Pipe A can fill a tank in 16 minutes and pipe B empties it in 24 minutes. If both the pipes are opened together, after how many minutes should B be closed, so that the tank is filled in 30 minutes?
1
21 minutes
2
20 minutes
3
18 minutes
4
15 minutes
5
None of the above/More than one of the above