railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes A and B can fill a cistern in 6 and 8 minutes respectively. If A starts the work and they be turned on alternatively for one minute each, how long will it take to fill the cistern?
1
\(3\frac{3}{7}\) minutes
2
\(6\frac{3}{4}\) minutes
3
6 minutes
4
\(6\frac{6}{7}\) minutes