document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=938296>Question 938296</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Travelling at an average speed of 5.80 m/s, how long would it take to complete the Boston Marathon a distance of 40.0 km? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #571566 by </B><A HREF=/tutors/aboutme.mpl?userid=mathmate><B>mathmate(429)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mathmate><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=mathmate><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=571566\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Key to solving this question is to work with consistent units.<BR>\n" );
document.write( "By writing units at every step, we can ensure that units are correct.\r<BR>\n" );
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document.write( "Important formula:  Distance = speed * time    (* is used to mean multiply)\r<BR>\n" );
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document.write( "40 km = 5.8 m/s * time<BR>\n" );
document.write( "Convert 40 km to metres (1 km = 1000 m)<BR>\n" );
document.write( "40000 m = 5.8 m/s * time<BR>\n" );
document.write( "Divide by 5.8 m/s on each side and switch sides,<BR>\n" );
document.write( "time = 40000/5.8 s<BR>\n" );
document.write( "= 6896.6 s<BR>\n" );
document.write( "Convert to hours and minutes (1 hour = 60 minutes, 1 minute = 60 seconds)<BR>\n" );
document.write( "time = 6896.6 s = 1 hour + 3296.6 s = 1 hour + 54 minutes + 56.6 seconds\r<BR>\n" );
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document.write( "Answer: It takes the runner 1h 54m 56.6s to finish the Boston Marathon. </SPAN>\n" );
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