document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=860309>Question 860309</A>: <I><SPAN STYLE=\"word-break: break-all;\"> person is planning a driving trip. part of her trip will be along major highways and part will be along country roads and city streets. speed limit on highways is 100/km/hr while limit on other roads is 60 km/hr. Total time he wants to spend driving is 12 hours and he has to travel 850 km. how much time should he plan to spend on each type of road. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #518306 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=518306\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> person is planning a driving trip. part of her trip will be along major highways and part will be along country roads and city streets. speed limit on highways is 100/km/hr while limit on other roads is 60 km/hr. Total time he wants to spend driving is 12 hours and he has to travel 850 km. how much time should he plan to spend on each type of road.<BR>\n" );
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document.write( "100x + 60(12-x) = 850 km<BR>\n" );
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document.write( "100x + 720 - 60x = 850<BR>\n" );
document.write( "40x = 130<BR>\n" );
document.write( "x = 13/4 = 3 1/4 = 3 hr 15 min(time on major highways)<BR>\n" );
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document.write( "12-x = 48/4-13/4 = 35/4 = 8 hr 45 min (time on other roads)<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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