document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1198781>Question 1198781</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Krystal left the hospital and drove toward the lake at an average speed of 45 km/h. -<BR>\n" );
document.write( "Heather left four hours later and drove in the opposite direction with an average speed of 80 km/h. Find the number of hours Heather needs to drive before they are 430 km apart. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #832429 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=832429\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Krystal left the hospital and drove toward the lake at an average speed of 45 km/h. -<BR>\n" );
document.write( "Heather left four hours later and drove in the opposite direction with an average speed of 80 km/h. Find the number of hours Heather needs to drive before they are 430 km apart.<BR>\n" );
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document.write( "In 4 hours, K moved 4*45 = 180 kms<BR>\n" );
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document.write( "Moving in opposite directions, speeds are added.<BR>\n" );
document.write( "45 + 80 = 125 km/hr<BR>\n" );
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document.write( "430 - 180 = 250 kms to go<BR>\n" );
document.write( "--- 250/125 = 2 hours<BR>\n" );
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