Question

2. Tap A can fill a tank in 4 hours while tap B can empty the full tank in 8 hours. When both taps are open, the tank will fill in​

Answer 1

Step-by-step explanation:

Time work efficiency

Tap A ---- 4 2

8

Tap B ----- 8 -1

---------------------------

1

So, the tank will be full in 8/1 = 8 hours .