document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=292469>Question 292469</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boy standing on the shore of a lake 1 mile wide wants to go to the store 3 miles down the shore on the opposite side of the lake. If he swims at 2 miles per hour, and walks at 4 miles per hour, is it quicker for him to swim directly across the lake and then walk to the store, or is it quicker for him to swim directly to the store? Prove this mathematically.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #211237 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=211237\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> walk 3 and swim 1<BR>\n" );
document.write( "4*w=3<BR>\n" );
document.write( "w=3/4<BR>\n" );
document.write( "2*s=1<BR>\n" );
document.write( "s=2/4<BR>\n" );
document.write( "s+w=5/4<BR>\n" );
document.write( "swim diagonal<BR>\n" );
document.write( "1^2+3^2=d^2<BR>\n" );
document.write( "1+9=d^2<BR>\n" );
document.write( "10=d^2<BR>\n" );
document.write( "sqrt(10)=d\r<BR>\n" );
document.write( "\n" );
document.write( "3.16=d<BR>\n" );
document.write( "2*s=3.16<BR>\n" );
document.write( "s=1.58 hours<BR>\n" );
document.write( "Faster and  safer to walk first.<BR>\n" );
document.write( ".\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );