Civil Services Kerala (കേരളം) PSC KAS Prelims Test Series 2025 Quantitative Aptitude Time and Work Pipe and Cistern
There are 4 pipes attached to a tank. Two to fill the tank and the other two to transfer the water into a cistern. The first two pipes can fill the tank in 40 sec and 80 sec, respectively, when opened alone, while the last two can empty in 80 sec and 160 sec, respectively, when opened alone. If all the pipes are opened together, in how much time will the tank be filled?
1
16.8 sec
2
24.44 sec
3
53.33 sec
4
21.2 sec