Onc Pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, the slower Pipe alone will be able to fill the tank in

Onc Pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, the slower Pipe alone will be able to fill the tank in
1). 81 minutes
2). 108 minutes
3). 144 minutes
4). 92 minutes

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