document.write( "Question 1149556: if barbara were to paint her room alone, it would take 4 hours. her sister Sarah could do the job in 5 hours. How long would it take them working together? \n" ); document.write( "
Algebra.Com's Answer #770890 by Alan3354(69443)\"\" \"About 
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if barbara were to paint her room alone, it would take 4 hours. her sister Sarah could do the job in 5 hours. How long would it take them working together?
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\n" ); document.write( "Probably 20 hours as they would start giggling instead of working.
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