document.write( "Question 729925: if ken takes 6 hours to pick 20 bushels of apples and working together with his son it takes 4 hours, how long would it take his son working alone \n" ); document.write( "
Algebra.Com's Answer #446322 by josgarithmetic(39617)\"\" \"About 
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Rates are additive. The rate unit is bushels per hour. \r
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\n" ); document.write( "\n" ); document.write( "Ken and his son working together, \"20%2F4\" bushels per hour.
\n" ); document.write( "Ken himself, \"20%2F6\" bushels per hour.
\n" ); document.write( "Ken Plus Son = Ken alone + Son alone
\n" ); document.write( "\"20%2F4=20%2F6%2BR\", where R is his son's rate.
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