document.write( "Question 172783: art can do a job in 30 minutes bob can do it in 40 min. and carl can do it in 60 min , how long will it take them all to do the job if they help eachother, write the equation \n" ); document.write( "

Algebra.Com's Answer #127624 by vleith(2983) $\"\"$ $\"About$

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Art can do 1/30 job/minute
\n" ); document.write( "Bob can do 1/40
\n" ); document.write( "Carl can d0 1/60\r
\n" ); document.write( "\n" ); document.write( "How many minutes will it take to for the 3 of them to do a single job?
\n" ); document.write( " $\"1+=+m%281%2F30+%2B+1%2F40+%2B+1%2F60%29\"$
\n" ); document.write( " $\"1+=+m%284%2F120+%2B+3%2F120+%2B+2%2F120%29\"$
\n" ); document.write( " $\"1+=+m%289%2F120%29\"$
\n" ); document.write( " $\"120%2F9+=+m+\"$
\n" ); document.write( " $\"13.333\"$ minutes \n" ); document.write( "

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