document.write( "Question 829276: John can paint a room in 10 hours by himself. If kelly helps, they can paint the same room in 6 hours. If kelly works alone, how long would it take her to paint the room? \n" ); document.write( "
Algebra.Com's Answer #499738 by TimothyLamb(4379)\"\" \"About 
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\n" ); document.write( "rates:
\n" ); document.write( "j = 1/10
\n" ); document.write( "j + k = 1/6
\n" ); document.write( "---
\n" ); document.write( "j + k = 1/6
\n" ); document.write( "1/10 + k = 1/6
\n" ); document.write( "k = 1/6 - 1/10
\n" ); document.write( "k = 10/60 - 6/60
\n" ); document.write( "k = 4/60
\n" ); document.write( "---
\n" ); document.write( "time = 1/rate:
\n" ); document.write( "kelly's time = 60/4
\n" ); document.write( "kelly's time = 15 hours
\n" ); document.write( "---
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