document.write( "Question 1091683: 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 64 square kilometers and supplied a local town with a population of 30,000 people? Consider only population uses, and neglect evaporation and so on. \n" ); document.write( "

Algebra.Com's Answer #706128 by ikleyn(52798) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "30,000 people consume   1200*30000*365/4 = 3285*10^6 liters of water per year = 3285*10^3 cubic meters of water per year.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "I divided by 4 accounting for the fact that the average family consists of 4 people.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "To find the depth the lake would lose per year, divide this volume by the area of the lake which is equal to\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "64 square kilometers = 64*10^6 square meters,  and you will get\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( " = . = 0.051 m = 5.1 cm.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );