SOLUTION: An average family of four uses roughly 1200 liters (about 300 gallons) of water per day. (One liter = 1000 cm3.) How much depth would a lake lose per year if it uniformly covered a

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Question 774820: An average family of four uses roughly 1200 liters (about 300 gallons) of water per day. (One liter = 1000 cm3.) How much depth would a lake lose per year if it uniformly covered an area of 82 square kilometers and supplied a local town with a population of 59,000 people? Consider only population uses, and neglect evaporation and so on.

Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
A couple things to prepare for first.

1200*365=liters of water used in 1 year
82%2Ah=1200%2A365, these volumes are equal: the portion of lake volume and the usage of water, having h = the depth of this quantity of water.

59000 people may mean on average, 59000/4=14800 average family households for this quantity of water.