document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=261858>Question 261858</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help solve: A helicopter used in fighting a forest fire travels at 105 mi/h from a fire to a pond and 70 mi/h with water from the pond to the fire. If a round trip takes 30 min.,how long does it take from the pond to the fire?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #192927 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=192927\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A helicopter used in fighting a forest fire travels at 105 mi/h from a fire to a pond and 70 mi/h with water from the pond to the fire. If a round trip takes 30 min.,how long does it take from the pond to the fire? <BR>\n" );
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document.write( "d = rt<BR>\n" );
document.write( "d = 105t = 70*(0.5 - t)<BR>\n" );
document.write( "105t = 35 - 70t<BR>\n" );
document.write( "175t = 35<BR>\n" );
document.write( "t = 0.2 hours at 105 mph<BR>\n" );
document.write( "t = 0.3 hours at 70 mph, the answer to the question<BR>\n" );
document.write( "From the pond to the fire takes 18 minutes<BR>\n" );
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document.write( "PS  Helicopters (and all aircraft) use knots, not mph.<BR>\n" );
document.write( "1 knot = 1 nautical mile per hour.<BR>\n" );
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