state gov Calcutta High Court Lower Division Assistant (LDA) Mock Test 2024 Quantitative Aptitude Time and Work Pipe and Cistern
A tank can be filled by tap A in 3 hrs and B can fill it in 4 hrs. Tap C can empty this filled tank in 6 hrs. If all three taps are opened simultaneously, how long will it take to fill the tank completely?
1
8 hrs
2
\(\frac{{10}}{7} hrs\)
3
5 hrs
4
\(\frac{{12}}{5} hrs\)