How much time will the Taps take to fill the Tank working in Different Orders SAT ACT SSC Maths

Related Example:
Q1. Taps A can fill a tank in 4 hours and tap B can fill it in 6 hours. In how many hours can both the taps fill the tank?
Q2. Taps A and B can together fill a tank in 6 hours. Find the time in which tap B can fill this tank if A takes 10 hours to fill the tank.
Q3. Taps A can fill a tank in 4 hours and tap B can fill it in 6 hours. First the tap A is switched on and then after an hour tap B is also switched on. Find the time during which the tap B was on to fill the tank.
Q4. A tank can be filled by the taps A, B, and drained by C. A can fill it in 4 h, B can fill it in 3 h and C can drain the tank in 2 h. In how many hours can all the three taps fill the tank?

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