document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=820997>Question 820997</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Erin runs once around the track every 75 seconds. Mark runs around the track once every 90 seconds. If they begin at the same time, in how many seconds will they pass the starting point at the same time?<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 #493827 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=493827\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Erin runs once around the track every 75 seconds. Mark runs around the track once every 90 seconds. If they begin at the same time, in how many seconds will they pass the starting point at the same time?<BR>\n" );
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document.write( "Find the least common multiple:<BR>\n" );
document.write( "75 = 3*5^2<BR>\n" );
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document.write( "90 = 2*5*3^2<BR>\n" );
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document.write( "lcm = 2*3*5^3 = 6*75 = 450 <BR>\n" );
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document.write( "Ans: after 450 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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