BANK IBPS RRB Clerk 2025 Mock Test Series (Pre + Mains) Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes M and N can fill a tank in 8 hours and 6 hours respectively. These pipes are opened alternately for every hour and pipes M is opened first, in how many hours, the tank fill-in?
1
8 hrs
2
9 hrs
3
12 hrs
4
7 hrs
5
None of these