The drinking water needs of an office are met by large water bottles.  One end of a 0.6-cm diameter plastic hose is inserted into the bottle placed on a high stand, while the other end with an on/off valve is placed 0.6 m below the bottom of the bottle.  If the water level in the bottle is 0.45 m when it is full, determine how long it will take at the minimum to fill a 0.25-L glass when the bottle is first opened. Neglect frictional and valve losses.

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