defence exam Indian Navy Fireman/Fire Engine Driver Mock Test 2024 Quantitative Aptitude Time and Work
Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectively. Tap A is open all the time and taps B and C are open for one hour each alternately. In how many hours will the tank be full?
1
7 hours
2
8 hours
3
7.5 hours
4
6 hours