document.write( "Question 866752: It takes Dave 20 hours to paint a fence. When he works with Mike, they can paint the same fence in 4 hours. How long would it take Mike to paint the fence working alone? \n" ); document.write( "
Algebra.Com's Answer #522460 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
1/20 + 1/M = 1/4
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