document.write( "Question 794705: tom can paint a fence in 8 hours. Huck can paint the same fence in 5 hours. How long would it take to put two coats of paint on the fence if Tom and Huck work together? \n" ); document.write( "
Algebra.Com's Answer #480690 by josmiceli(19441)\"\" \"About 
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Another way to say 2 coats is
\n" ); document.write( "to paint the fence twice
\n" ); document.write( "Also, that is the same as painting
\n" ); document.write( "2 identical fences
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\n" ); document.write( "Tom's rate is:
\n" ); document.write( "\"+1%2F8+\" = ( 1 fence ) / ( 8 hrs )
\n" ); document.write( "Huck's rate is:
\n" ); document.write( "\"+1%2F5+\" = ( 1 fence ) / ( 5 hrs )
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\n" ); document.write( "Let \"+t+\" = the time in hrs for them
\n" ); document.write( "to paint 2 fences
\n" ); document.write( "\"+2%2Ft+\" = ( 2 fences ) / ( t hrs )
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\n" ); document.write( "\"+1%2F8+%2B+1%2F5+=+2%2Ft+\"
\n" ); document.write( "Multiply both sides by \"+40t+\"
\n" ); document.write( "\"+5t+%2B+8t+=+80+\"
\n" ); document.write( "\"+13t+=+80+\"
\n" ); document.write( "\"+t+=+6.154+\"
\n" ); document.write( "It will take them 6.154 hrs\r
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