K kelseykitty New member Joined Dec 8, 2008 Messages 1 Dec 8, 2008 #1 An uderground water supply has a depth of 200 meters. Water seeps in at the rate of 4 centimeters a year. Water is pumped out at the rate of 1 meter a year. How long will this water supply last? Can anyone help me?

An uderground water supply has a depth of 200 meters. Water seeps in at the rate of 4 centimeters a year. Water is pumped out at the rate of 1 meter a year. How long will this water supply last? Can anyone help me?

mmm4444bot Super Moderator Staff member Joined Oct 6, 2005 Messages 10,251 Dec 8, 2008 #2 Convert 4 cm to meters. Subtract it from 1 meter. The difference is the net depth lost each year. Divide 200 by this net loss to see how many years the water will last.

Convert 4 cm to meters. Subtract it from 1 meter. The difference is the net depth lost each year. Divide 200 by this net loss to see how many years the water will last.