document.write( "Question 989061: sue can rake the leaves by herself in 4 hours while it takes sam 5 hours to rake the leave by himself. how long would it take them to rake the leaves if they worked together \n" ); document.write( "

Algebra.Com's Answer #609493 by KMST(5328) $\"\"$ $\"About$

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Sue does $\"1%2F4\"$ of the job in one hour.
\n" ); document.write( "Sam does $\"1%2F5\"$ of the job in one hour.
\n" ); document.write( "Working together, Sue and Sam would do
\n" ); document.write( " $\"1%2F4%2B1%2F5=5%2F20%2B4%2F20=9%2F20\"$ of the job in one hour.
\n" ); document.write( "At that rate, they would finish the job in
\n" ); document.write( " $\"1%2F%28%289%2F20%29%29\"$ $\"hours=20%2F9\"$ $\"hours=2%262%2F9\"$ $\"hours\"$ . \n" ); document.write( "

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