water seeps in at 4 cm/year, is pumped out at 1 m/yr

kelseykitty

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Dec 8, 2008
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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

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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.

 
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