Question

One pipe can fill a tank three times as fast as
another pipe. If together the two pipes can fill
the tank in 36 minutes, then the slower pipe
alone will be able to fill the tank in:
(a) 92 min (b) 112 min
(c) 144 min (d) 192 min

Answer 1

Answer is b part of your question

Answer 2

According to your question, I though the answer is b. I'm not realy sure.