document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=906000>Question 906000</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car tests a new engine by traveling a straight course a distance of 3000 meters. During the first half of the course, the car averages a speed of 20 m/s, and during the second half of the course, the car averages a speed of 30 m/s. What is the car's average speed for the entire course?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #549611 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=549611\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A car tests a new engine by traveling a straight course a distance of 3000 meters. During the first half of the course, the car averages a speed of 20 m/s, and during the second half of the course, the car averages a speed of 30 m/s. What is the car's average speed for the entire course?<BR>\n" );
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document.write( "average speed=distance/travel time<BR>\n" );
document.write( "travel time=distance/speed<BR>\n" );
document.write( "=1500/20+1500/30<BR>\n" );
document.write( "=75+50=125 s<BR>\n" );
document.write( "What is the car's average speed for the entire course? 3000/125=24 m/s </SPAN>\n" );
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