document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=921523>Question 921523</A>: <I><SPAN STYLE=\"word-break: break-all;\"> two boats left an island at the same time to return to their home port. Their average speeds differed by 4 km/h. The faster boat reached port after 3 hours. The slower boat took 30 minutes longer. Find the average speed of the each boat.\r<BR>\n" );
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document.write( "(this is a rate*time=distance problem)   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #559029 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=559029\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two boats left an island at the same time to return to their home port. Their average speeds differed by 4 km/h. The faster boat reached port after 3 hours. The slower boat took 30 minutes longer. Find the average speed of the each boat. <BR>\n" );
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document.write( "let x=speed of slower boat<BR>\n" );
document.write( "x+4=speed of faster boat<BR>\n" );
document.write( "speed*travel time=distance(same for both boats)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "(x+4)*3=x*3.5<BR>\n" );
document.write( "3x+12=3.5x<BR>\n" );
document.write( ".5x=12<BR>\n" );
document.write( "x=24<BR>\n" );
document.write( "x+4=28<BR>\n" );
document.write( "ave speed of slower boat=24 km/hr<BR>\n" );
document.write( "ave speed of faster boat=28 km/hr<BR>\n" );
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