document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=255994>Question 255994</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boardwalk is parallel to and 210 ft inland from a straight shoreline. A man is standing on the boardwalk, exactly 750 ft across the sand from his beach umbrella, which is right at the shoreline. The man walks 4 ft/s on the boardwalk and 2 ft/s on the sand. How far should he walk on the boardwalk before veering off onto the sand if he wishes to reach his umbrella in exactly 4 min 45 sec. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #188309 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=188309\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A boardwalk is parallel to and 210 ft inland from a straight shoreline.<BR>\n" );
document.write( " A man is standing on the boardwalk, exactly 750 ft across the sand from his beach umbrella, which is right at the shoreline.<BR>\n" );
document.write( " The man walks 4 ft/s on the boardwalk and 2 ft/s on the sand.<BR>\n" );
document.write( " How far should he walk on the boardwalk before veering off onto the sand if he wishes to reach his umbrella in exactly 4 min 45 sec.<BR>\n" );
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document.write( "Work this in seconds; 4 min 45 sec = 285 seconds<BR>\n" );
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document.write( "Find out how long to arrive at his umbrella, at the two extremes<BR>\n" );
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document.write( "1.Heading directly to umbrella across the sand 750ft away<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=750%2F2 ALIGN=MIDDLE  ALT=\"750%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 325 sec<BR>\n" );
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document.write( "2. Walking the board-walk to a point directly in front of the umbrella then<BR>\n" );
document.write( "heading across the sand 210 ft<BR>\n" );
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document.write( "Find the boardwalk distance (b), one leg of a right triangle<BR>\n" );
document.write( "b = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28750%5E2+-+210%5E2%29 ALIGN=MIDDLE  ALT=\"sqrt%28750%5E2+-+210%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "b = 720 ft, the dist on the board walk<BR>\n" );
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document.write( "total time = time on b.w + time on sand<BR>\n" );
document.write( " t = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=720%2F4 ALIGN=MIDDLE  ALT=\"720%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=210%2F2 ALIGN=MIDDLE  ALT=\"210%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "t = 180 + 105 <BR>\n" );
document.write( "t = 285 sec which is 4 min 45 sec<BR>\n" );
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document.write( "Answer: 720 ft on the boardwalk </SPAN>\n" );
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