document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=989011>Question 989011</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Robert can paint a room in 12 hours. Dennis and Vince can paint the room in 10 hours and 9 hours, respectively. If Dennis and Vince work together for 2 hours, how long will it take Robert to finish the job?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #609469 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=609469\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Robert can paint a room in 12 hours. Dennis and Vince can paint the room in 10 hours and 9 hours, respectively. If Dennis and Vince work together for 2 hours, how long will it take Robert to finish the job? <BR>\n" );
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document.write( "Robert rate:: 1/12 job/hr<BR>\n" );
document.write( "Dennis rate:: 1/10 job/hr<BR>\n" );
document.write( "Vince rate:: 1/9 job/hr<BR>\n" );
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document.write( "time*rate = work done<BR>\n" );
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document.write( "2(1/10 + 1/9)  = 2(19/90) = 19/45 job done by D and V together<BR>\n" );
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document.write( "(1/12)x = 1 - (19/45)<BR>\n" );
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document.write( "(1/12)x = 26/45<BR>\n" );
document.write( "x = 12*26/45<BR>\n" );
document.write( "x = 6.93 hours (time for Robert to finish the job)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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