document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=201710>Question 201710</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a race car can go around a track in 5 minutes,then how long will it take to go around the track if it increases its speed by 20%?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #151971 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=151971\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> v=d/t<BR>\n" );
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document.write( "(1) v=d/5<BR>\n" );
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document.write( "(2) 1.2 v = d/t<BR>\n" );
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document.write( "from  (2),,v=d/(1.2 t) = d /5,,,,,,from(1)<BR>\n" );
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document.write( "1.2 t =5<BR>\n" );
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document.write( "t= 5/1.2 = 4.17 min<BR>\n" );
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document.write( "checking,,,,let  d=10, v= 10/5 =2<BR>\n" );
document.write( "v2= 10/4.17 = 2.4<BR>\n" );
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document.write( "2.4 / 2 = 1.2,,,or  20 % higher,,,ok  </SPAN>\n" );
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