engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Pipe A alone can fill a tank in 8 hours. Pipe B alone can fill it in 6 hours. If both the pipes are opened and after 2 hours pipe A is closed, then pipe B will fill the remaining tank in:
1
6 hours
2
4 hours
3
\(2 \frac{1}{2}\) hours
4
\(3 \frac{1}{2}\) hours