document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=264257>Question 264257</A>: <I><SPAN STYLE=\"word-break: break-all;\"> With a tail wind, a helicopter traveled 300 miles in 1hour and 40 min. The return trip against the same wind took 20 min longer. Find the wind speed and also the air speed of the helicopter. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #194568 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=194568\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> With a tail wind, a helicopter traveled 300 miles in 1hour and 40 min. The return trip against the same wind took 20 min longer. Find the wind speed and also the air speed of the helicopter.<BR>\n" );
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document.write( "Downwind ground speed was 300/(5/3) = 180 mph<BR>\n" );
document.write( "Upwind ground speed was 300/2 = 150 mph<BR>\n" );
document.write( "The airspeed is the average, (180+150)/2 = 165 mph<BR>\n" );
document.write( "The windspeed is 15 mph<BR>\n" );
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document.write( "PS  My helicopter didn't go that fast.\r<BR>\n" );
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