document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=100258>Question 100258</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane flies 1000 miles due east in 2 hours and 1000 miles due south in 3 hours.  What is the average speed of the airplane?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #73014 by </B><A HREF=/tutors/aboutme.mpl?userid=bucky><B>bucky(2189)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=bucky><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=73014\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The equation that you need to use is:<BR>\n" );
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document.write( "D = R*T<BR>\n" );
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document.write( "in which D is the total distance flown, R is the Rate or Speed, and T is the total time required<BR>\n" );
document.write( "for this travel.<BR>\n" );
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document.write( "The plane flies 1000 miles on one leg plus another 1000 miles on the second leg of this flight.<BR>\n" );
document.write( "Therefore, the total distance is 1000 + 1000 = 2000 miles.<BR>\n" );
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document.write( "The first leg of the flight takes 2 hours and the second leg of the flight takes 3 hours.<BR>\n" );
document.write( "Therefore, the total time of flight is 2 + 3 = 5 hours.<BR>\n" );
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document.write( "Substitute the total distance (2000 miles) and the total time (5 hours) into the equation<BR>\n" );
document.write( "and you get:<BR>\n" );
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document.write( "2000 = R*5<BR>\n" );
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document.write( "or in more standard form:<BR>\n" );
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document.write( "5*R = 2000<BR>\n" );
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document.write( "Solve for R by dividing both sides of this equation by 5 which is the multiplier of R to get:<BR>\n" );
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document.write( "5*R/5 = 2000/5<BR>\n" );
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document.write( "and after doing the division the equation simplifies to:<BR>\n" );
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document.write( "R = 2000/5 = 400 miles/hour<BR>\n" );
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document.write( "So the answer to this problem is that the average speed of the plane for this 5 hour flight<BR>\n" );
document.write( "is 400 miles per hour.<BR>\n" );
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document.write( "Hope this helps you to understand the problem a little better.<BR>\n" );
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document.write( " </SPAN>\n" );
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