document.write( "Question 595491: in one person can wash a car in 20 minutes and another person washes a car in 30 minutes,how long will it take together to wash a car \n" ); document.write( "
Algebra.Com's Answer #377167 by edjones(8007)\"\" \"About 
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One can do 1/20 of the job in 1 minute.
\n" ); document.write( "The other can do 1/30.
\n" ); document.write( "1/20 + 1/30
\n" ); document.write( "=3/60 + 2/60
\n" ); document.write( "=5/60
\n" ); document.write( "=1/12 the job together in 1 minute.
\n" ); document.write( "12 minutes it takes to do the job together.
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