document.write( "Question 916135: Mike can paint one chair in 4 hours. Laura can paint 3 chairs in 7 hours. If they work together how long will it take them to paint 2 chairs? \n" ); document.write( "

Algebra.Com's Answer #555913 by mananth(16946) $\"\"$ $\"About$

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Mike can paint one chair in 4 hours. Laura can paint 3 chairs in 7 hours. If they work together how long will it take them to paint 2 chairs?\r
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\n" ); document.write( "\n" ); document.write( "Mike can paint one chair in 4 hours.
\n" ); document.write( "he can paint 2 chairs in 8 hours\r
\n" ); document.write( "\n" ); document.write( "Laura can paint 3 chairs in 7 hours.
\n" ); document.write( "she can paint 2 chairs in 14/3 hours\r
\n" ); document.write( "\n" ); document.write( "Let painting two chairs be 1 job\r
\n" ); document.write( "\n" ); document.write( "Mike does 1/8 of the job in 1 hour
\n" ); document.write( "Laura does 3/14 of the job in 1 hour\r
\n" ); document.write( "\n" ); document.write( "In 1 hour they together do 1/8 + 3/14 of the job\r
\n" ); document.write( "\n" ); document.write( "=21/56 of the job in 1 hour\r
\n" ); document.write( "\n" ); document.write( "so they take 56/21 hours together\r
\n" ); document.write( "\n" ); document.write( "= 2.66 hours\r
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\n" ); document.write( "\n" ); document.write( "If they work together how long will it take them to paint 2 chairs? \n" ); document.write( "

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