document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=680863>Question 680863</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having trouble with this problem?  Can someone please help me?<BR>\n" );
document.write( "Dustin takes one hour to drive 40 miles from home to work every morning. He spends 30 minutes driving on the highway, 20 minutes driving on city roads, and 10 minutes driving on country roads. If he drives at the same speed on the country roads and the city roads, and travels 3 miles on the country roads, what is his average speed in miles per hour on the highway? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #422493 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10551)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=422493\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "I am having trouble with this problem?  Can someone please help me?<BR>\n" );
document.write( "Dustin takes one hour to drive 40 miles from home to work every morning. He spends 30 minutes driving on the highway, 20 minutes driving on city roads, and 10 minutes driving on country roads. If he drives at the same speed on the country roads and the city roads, and travels 3 miles on the country roads, what is his average speed in miles per hour on the highway?\r<BR>\n" );
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document.write( "Since he drove 3 miles on the country roads and spent 10 minutes there, then his speed on the country roads = 3/(10/60), or 3/(1/6), or 18 mph. His speed on the city roads is also 18 mph\r<BR>\n" );
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document.write( "As his speed on the city roads is 18 mph, the distance traveled on city roads = 18 * 20/60, or 18 * 1/3, or 6 miles\r<BR>\n" );
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document.write( "Since he traveled 3 miles on country roads, and 6 miles on city roads, then he must’ve traveled 40 – (3 + 6), or 40 – 9, or 31 miles on the highway\r<BR>\n" );
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document.write( "Traveling for 31 miles on the highway, for 30 minutes (˝ hr), his speed = 31/(˝), or 31 * 2, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%2862%29 ALIGN=MIDDLE  ALT=\"highlight_green%2862%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph     \r<BR>\n" );
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document.write( "You can do the check!!\r<BR>\n" );
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document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com </SPAN>\n" );
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