state gov Bihar Vidhan Parishad Assistant & DEO Mock Test 2023 Quantitative Aptitude Time and Work Pipe and Cistern
Three taps A, B and C can fill a tank in 10, 12 and 15 hours respectively. How long (in hours) would the three taps take to fill the tank if all of them are opened together?
1
4
2
8
3
6
4
7