document.write( "Question 906534: Pedro can paint a fence 50 % faster that Juan and 20% faster than Pilar and together they can paint a given fence in 4 hours. How long will it take Pedro to paint the same fence if he had to work alone? \n" ); document.write( "
Algebra.Com's Answer #549959 by richwmiller(17219)\"\" \"About 
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o=Pedro
\n" ); document.write( "n=Juan
\n" ); document.write( "r=Pilar
\n" ); document.write( "1/o+1/n+1/r=1/x
\n" ); document.write( "o=1.2*r,
\n" ); document.write( "o=1.5*n,
\n" ); document.write( "n=o/1.5
\n" ); document.write( "o=1.2*r,
\n" ); document.write( "r=o/1.2
\n" ); document.write( "n=o/1.5
\n" ); document.write( "1/o+1/(o/1.5)+1/(o/1.2)=1/4
\n" ); document.write( "1/o+1.5/o+1.2/o=1/4
\n" ); document.write( "3.7/o=1/4
\n" ); document.write( "o=4*3.7
\n" ); document.write( "o=14.8
\n" ); document.write( "Pedro can paint alone in 14.8 hours\r
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