document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1191596>Question 1191596</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Dan drove from his farm to town, traveling the first 50 km at 80 km/h, and the next 30 km at 60 km/h. He then returned home at 100 km/h. What was his average speed for the whole trip? </SPAN>\n" );
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document.write( "average speed = total distance divided by total time<br><BR>\n" );
document.write( "50km at 80 km/h = 5/8 hours<BR>\n" );
document.write( "30km at 60 km/h = 1/2 hour<BR>\n" );
document.write( "80km at 100km/h = 4/5 hours<br><BR>\n" );
document.write( "total distance: 160km<BR>\n" );
document.write( "total time: (5/8+1/2+4/5) hours<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=160%2F%285%2F8%2B1%2F2%2B4%2F5%29 ALIGN=MIDDLE  ALT=\"160%2F%285%2F8%2B1%2F2%2B4%2F5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "you can do the calculations....<br><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );