document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=261795>Question 261795</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a cyclist went 1km up a hill at 15km per hour then she went down the hill at 30km per hour show that her average speed for the 2km was 20km per hour  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #193035 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=193035\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D=RT<BR>\n" );
document.write( "2=20T<BR>\n" );
document.write( "T=2/20<BR>\n" );
document.write( "T=.1 HOUR.<BR>\n" );
document.write( "1=15*X<BR>\n" );
document.write( "1=30(.1-X)<BR>\n" );
document.write( "15X=30(.1-X)<BR>\n" );
document.write( "15X=3-30X<BR>\n" );
document.write( "15X+30X=3<BR>\n" );
document.write( "45X=3<BR>\n" );
document.write( "X=3/45<BR>\n" );
document.write( "X=.0666 ANS FOR THE TIME GOING UP THE MOUNTAIN.<BR>\n" );
document.write( ".1-.0666=.0334 ANS. FOR THE MINUTES DOWN THE MOUNTAIN.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "15*.0666=30(.1-.0666)<BR>\n" );
document.write( "1=30*.0334<BR>\n" );
document.write( "1=1<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );