document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=519968>Question 519968</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A bicycle trip of 90 miles would have taken an hour less if the average speed had been increased by 3 mi/h. Find the average speed of the bicycle.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #345878 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16949)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=345878\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let speed be x\r<BR>\n" );
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document.write( "t=d/r\r<BR>\n" );
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document.write( "time with original speed - time with increased speed = 1<BR>\n" );
document.write( "90/x-90/(x+3)=1<BR>\n" );
document.write( "LCD=x(x+3)<BR>\n" );
document.write( "multiply by LCD<BR>\n" );
document.write( "90(x+3)-90x=x(x+3)<BR>\n" );
document.write( "90x+270-90x=x^2+3x\r<BR>\n" );
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document.write( "x^2+3x-270=0<BR>\n" );
document.write( "x^2+18x-15x-270=0<BR>\n" );
document.write( "x(x+18)-15(x+18)=0<BR>\n" );
document.write( "(x+18)(x-15)=0<BR>\n" );
document.write( "x=15 ignoring negative value\r<BR>\n" );
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document.write( "speed = 15 mph\r<BR>\n" );
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document.write( "m.ananth@hotmail.ca </SPAN>\n" );
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