Question

Two taps P and Q can fill a pool in 6 hours and 9 hours respectively. A third tap. R can empty
the pool in 12 hours. How long will it take to fill the pool, if all the three taps are opened
together?​

Answer 1

Answer:

p and q fill a pull=1/6+1/9

R empty the pull=1/12

1/6+1/9-1/12

Answer 2

Answer:

I don't no the answering jqmqoqkmqjak