document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=274937>Question 274937</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mary can paint a house in 4 hrs.John can paint the same house in 6 hrs. How long will it take to paint house together.  First I converted hours to minutes, added them together, then divided by two. please help me set up this problem correctly. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #200610 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=200610\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mary can paint a house in 4 hrs.John can paint the same house in 6 hrs. How long will it take to paint house together.  First I converted hours to minutes, added them together, then divided by two. please help me set up this problem correctly.<BR>\n" );
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document.write( "Instead of converting to minutes, you could have added 4 hours and 6 hours = 10 hours.  It still wouldn't be right.<BR>\n" );
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document.write( "Mary paints 1/4 of the hours per hour.<BR>\n" );
document.write( "John paints 1/6 per hour.<BR>\n" );
document.write( "Add those up --> 1/4 + 1/6 = 5/12 per hour<BR>\n" );
document.write( "--> 12/5 hours to do the job = 2.4 hours<BR>\n" );
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document.write( "Use the shortcut, product/sum<BR>\n" );
document.write( "4*6/(4+6) = 24/10 = 2.4 hours<BR>\n" );
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