SSC Delhi Police Constable 2025 Mock Test Series (New) Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes A and B can fill a cistern in 37\(\frac{1}{2}\) minutes and 45 minutes, respectively. Both pipes are open. The cistern will be filled in just half an hour, if the B is turned off after:
1
9 min
2
10 min
3
5 min
4
15 min