document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=297628>Question 297628</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It takes a child 90 seconds to climb the 60m length of an escalator which is not<BR>\n" );
document.write( "working. When in operation, the escalator lifts a passenger from bottom to top in 60 seconds. How long does it take the child to cover the 60 meters, if she walks on the moving escalator? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #214286 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=214286\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 60/60=1 mps<BR>\n" );
document.write( "The escalator lifts at 1 meter per sec.<BR>\n" );
document.write( " <BR>\n" );
document.write( "r*t=d<BR>\n" );
document.write( "r=d/t=60/90=2/3 mps<BR>\n" );
document.write( "The child goes at 2/3 mps<BR>\n" );
document.write( "1+2/3=5/3 mps<BR>\n" );
document.write( "together they go 5/3 meters per sec<BR>\n" );
document.write( "5/3*x=60<BR>\n" );
document.write( "x=60*3/5=12*3=36 seconds<BR>\n" );
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