SSC NTA Delhi University Non-Teaching 2021 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Pipe A can fill a cistern in 36 minutes and B in 48 minutes. If both the pipes are opened together, when should pipe B be closed so that the cistern may be just full in 24 minutes?
1
8 mins
2
9 mins
3
12 mins
4
16 mins