railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Tap X can fill a tank in 20 hours and Tap Y can fill a tank in 5 hours.If they are opened on alternate hours, if pipe X is opened first then in how many hours, the tank will be filled?
1
8 hours
2
4 hours
3
7 hours
4
10 hours