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One pipe can fill a tank 4 times as fast as another pipe. If together the two pipes can fill the tank in 15 minutes, then the slower pipe alone will be able to fill the tank in:
75minutes
60minutes
55minutes
45minutes
1/x+4/x = 1/15 5/x = 1/15 X/5= 15 X = 75minutes Hence, option 1 is the correct answer.
By: Amit Kumar ProfileResourcesReport error
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