document.write( "Question 1021553: sally can paint a room in 7 hours while it takes steve 9 hours how long would it take them to paint a room together? \n" ); document.write( "
Algebra.Com's Answer #637295 by ikleyn(52879)\"\" \"About 
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\n" ); document.write( "sally can paint a room in 7 hours while it takes steve 9 hours how long would it take them to paint a room together?
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document.write( "Sally's rate of painting room is \"1%2F7\" of the painting area per hour.\r\n" );
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document.write( "Steve's rate of painting room is \"1%2F9\" of the painting area per hour.\r\n" );
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document.write( "Their combined rate is \"1%2F7+%2B+1%2F9\" = \"9%2F63+%2B+7%2F63\" = \"16%2F63\" of the painting area per hour.\r\n" );
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document.write( "Hence, it will take \"63%2F16\" = \"3\"\"15%2F16\" of an hour for Sally and Steve to paint the room, if they work together.\r\n" );
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\n" ); document.write( "\n" ); document.write( "For many other similar solved problems on joint work see the lesson
\n" ); document.write( "Using fractions to solve word problems on joint work in this site.\r
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