document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=669767>Question 669767</A>: <I><SPAN STYLE=\"word-break: break-all;\"> using the butterfly stroke to swim the length of the pool, Eva averaged 1.5 m/s. Swimming back, she used the breast stroke and averages 1.2 m/s. The entire swim took 1 min. and 15 sec. How long was the pool? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #416578 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=416578\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> using the butterfly stroke to swim the length of the pool, Eva averaged 1.5 m/s. Swimming back, she used the breast stroke and averages 1.2 m/s. The entire swim took 1 min. and 15 sec. How long was the pool?<BR>\n" );
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document.write( "The average speed of the round trip = 2*1.5*1.2/(1.5+1.2) = 3.6/2.7<BR>\n" );
document.write( "= 4/3 m/sec<BR>\n" );
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document.write( "1:15 = 75 seconds<BR>\n" );
document.write( "Round trip distance = r*t = (4/3)*75 = 100 meters<BR>\n" );
document.write( "One way = 50 meters<BR>\n" );
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