document.write( "Question 1004221: The Cooper family and the Jackson family each used their sprinklers last summer. The water output rate for the Cooper family's sprinkler was 30L per hour. The water output rate for the Jackson family's sprinkler was 25L per hour. The families used their sprinklers for a combined total of 50 hours, resulting in a total water output of 1425L. How long was each sprinkler used? \n" ); document.write( "

Algebra.Com's Answer #620741 by josgarithmetic(39631) $\"\"$ $\"About$

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R*T=W uniform rate rule for water output W, quantity in liters\r
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\n" ); document.write( "\n" ); document.write( "c, time for cooper's output
\n" ); document.write( "j, time for jackson's output\r
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document.write( "              rate       time       volume in liters\r\n" );
document.write( "COOPER         30        (c)         30c\r\n" );
document.write( "JACKSON        25        (j)         25j\r\n" );
document.write( "TOTAL                    50          1425\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solve this system for c and j.
\n" ); document.write( " $\"system%28c%2Bj=50%2C30c%2B25j=1425%29\"$ \n" ); document.write( "

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