Question

Pipe A can fill a tank in 14
minutes and pipe B can empty it
in 21 minutes. If both the pipes
are opened together after how
many minutes should pipe B be
closed, so that the tank is filled
in 28 minutes?​

Answer 1

Answer:

i think the answer is 22 minutes

Step-by-step explanation:

Answer 2

Answer:

I think 7 minutes

If its correct mark as brainliest answer