document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=594029>Question 594029</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Elda walked from her home to her friend Niabi's house at 4.5 km/hr. When Elda returned home along the same route, she strolled at 3.5 km/hr. Elda took a total of 40 min to walk to Niabi's house and back again.<BR>\n" );
document.write( "a) How many minutes did Elda take to walk from her home to Niabi's house?<BR>\n" );
document.write( "b) How far is it from Elda's home to Niabi's house? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #376581 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=376581\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Elda walked from her home to her friend Niabi's house at 4.5 km/hr. When Elda returned home along the same route, she strolled at 3.5 km/hr. Elda took a total of 40 min to walk to Niabi's house and back again.<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Avg speed for the round trip = 2*4.5*3.5/(4.5 + 3.5)<BR>\n" );
document.write( "= 31.5/8 km/hr<BR>\n" );
document.write( "RT distance = r*t = 31.5/8 * (2/3) hr = 21/8 km<BR>\n" );
document.write( "--> 21/16 km each way.<BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "a) How many minutes did Elda take to walk from her home to Niabi's house?<BR>\n" );
document.write( "t = d/r = (21/16)/4.5 = 21/72 hours<BR>\n" );
document.write( "= 7/24 hours<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "b) How far is it from Elda's home to Niabi's house?<BR>\n" );
document.write( "--> 21/16 km each way. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );