Teaching NVS Junior Secretariat Assistant (JSA) Mock Test 2024 Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes A and B can fill a tank with water in 30 minutes and 45 minutes respectively. The water pipe C can empty the tank in 36 minutes. First A and B are opened. After 12 minutes C is opened. The total time (in minutes) in which the tank will be filled up is:
1
30
2
36
3
18
4
24