document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=710916>Question 710916</A>: <I><SPAN STYLE=\"word-break: break-all;\"> flying into the wind, a helicopter takes 15 min to travel 15 kilometers. The return takes 12 minutes. If the wind speed and direction remain constant during the trip, write and solve a system of equation to find the speed of the wind (in Kpm) and speed of the helicopter (in KPM).\r<BR>\n" );
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document.write( "I tired i got it wrong please help me to see the right direction </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #437238 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=437238\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> flying into the wind, a helicopter takes 15 min to travel 15 kilometers. The return takes 12 minutes. If the wind speed and direction remain constant during the trip, write and solve a system of equation to find the speed of the wind (in Kpm) and speed of the helicopter (in KPM). <BR>\n" );
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document.write( "Against wind DATA:<BR>\n" );
document.write( "distance = 15 km ; time = 15 min ; rate = d/t = 1 km/min<BR>\n" );
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document.write( "With wind DATA:<BR>\n" );
document.write( "distance = 15 km ; time = 12 min ; rate = d/t = 15/12 = 5/4 km/min<BR>\n" );
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document.write( "Equations:<BR>\n" );
document.write( "p + w = (5/4) km/min<BR>\n" );
document.write( "p - w =   1   km/min<BR>\n" );
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document.write( "Add and solve for \"p\":<BR>\n" );
document.write( "2p = 9/4<BR>\n" );
document.write( "p = 9/8 km/min (speed of the plane in still air)<BR>\n" );
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document.write( "Solve for \"w\":<BR>\n" );
document.write( "p - w = 1<BR>\n" );
document.write( "w = p -1 = (9/8)-1 = 1/8 km/min (speed of the wind)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=================================== </SPAN>\n" );
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