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: Choose one: A) 144 min B) 145 min C) 150 min D) 200 min E) 250 min
slower pipe alone fill the tank = x   faster pipe will fill in x/3 min   1/x+3/x=1/36   x=144 min   144 minNSWER 144 min
<result>A</result>
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: