BANK IBPS RRB PO Mock Test Series 2025 (Pre + Mains) Quantitative Aptitude Time and Work Pipe and Cistern
The Pipe M can fill the cistern in 8 hours and pipe N can empty the cistern in 9 hours respectively. These pipes are opened alternately and pipes M is opened first, in how many hours, the cistern fill-in?
1
130 hours
2
124 hours
3
135 hours
4
127 hours
5
None of these