document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=626423>Question 626423</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat propelled so as to travel with a speed of 25 ms-1 in still water, moves directly across a river 600m wide, the river flowing at 15 ms-1. How long will it take the boat to across the river? Toward what point on the opposite share is the point headed when it start. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #394295 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=394295\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A boat propelled so as to travel with a speed of 25 ms-1 in still water, moves directly across a river 600m wide, the river flowing at 15 ms-1. How long will it take the boat to across the river?<BR>\n" );
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document.write( "The boat's speed wrt the Earth = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%2825%5E2+-+15%5E2%29+=+20+m%2Fsec ALIGN=MIDDLE  ALT=\"sqrt%2825%5E2+-+15%5E2%29+=+20+m%2Fsec\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Toward what point on the opposite share is the point headed when it start.<BR>\n" );
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document.write( "To travel in a straight line, the boat's heading will be into the current.<BR>\n" );
document.write( "The angle from \"straight across\" is asin(15/25)<BR>\n" );
document.write( "=~ 36.9 degrees. </SPAN>\n" );
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