engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Quantitative Aptitude Time and Work Pipe and Cistern
There are two taps in a tank. One tap fills the tank in 8 hours and another tap empties it in 10 hours. If both the taps are opened simultaneously, then in how much time will the tank be filled?
1
40
2
20
3
30
4
50