document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=401302>Question 401302</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A blimp flies at 60 miles per hour. A round trip of 40 miles into the wind and 40 miles with the wind takes 1.5 hours. What is the speed of the wind? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #284049 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=284049\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A blimp flies at 60 miles per hour. A round trip of 40 miles into the wind and 40 miles with the wind takes 1.5 hours. What is the speed of the wind?\r<BR>\n" );
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document.write( "60 miles per hour. <BR>\n" );
document.write( "wind speed = w<BR>\n" );
document.write( "...<BR>\n" );
document.write( "against wind speed = 60-w<BR>\n" );
document.write( "with wind speed = 60+w<BR>\n" );
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document.write( "40 miles into the wind <BR>\n" );
document.write( "40 miles with the wind takes 1.5 hours. <BR>\n" );
document.write( "...<BR>\n" );
document.write( "time with wind + time agianst wind = 1.5 hours<BR>\n" );
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document.write( "t=d/r<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40%2F%2860%2Bw%29++%2B40%2F%2860-w%29=+1.5 ALIGN=MIDDLE  ALT=\"40%2F%2860%2Bw%29++%2B40%2F%2860-w%29=+1.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "LCD = (60+w)(60-w)\r<BR>\n" );
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document.write( "multiply by the LCD<BR>\n" );
document.write( "40(60-w)+40(60+w)=1.5(60+w)(60-w)\r<BR>\n" );
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document.write( "2400-40w+2400+40w=1.5(3600-w^2)<BR>\n" );
document.write( "4800=1.5(3600-w^2)<BR>\n" );
document.write( "divide by 1.5<BR>\n" );
document.write( "3200=3600-w^2<BR>\n" );
document.write( "w^2=3600-3200<BR>\n" );
document.write( "w^2=400<BR>\n" );
document.write( "w=20 mph ===>speed of wind<BR>\n" );
document.write( "...<BR>\n" );
document.write( "m.ananth@hotmail.ca </SPAN>\n" );
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