railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Pipe and Cistern
Pipe A empties a cistern in 16 hours and pipe B empties the same cistern in 20 hours. When the cistern is full, if both the pipes were left opened and closed after 8 hours, what part of the cistern remained filled after 8 hours?
1
1/4
2
1/5
3
1/8
4
1/10