engineering recuitment GATE CSE 2023-24 Test Series Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes A and B can fill a tank in 12 minutes and 16 minutes respectively. If the two pipes are open simultaneously, after how many minutes should the pipe B be closed if the tank is to fill in 9 minutes?
1
4 minutes
2
4½ minutes
3
3½ minutes
4
4¾ minutes