document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=315716>Question 315716</A>: <I><SPAN STYLE=\"word-break: break-all;\"> it takes a child 90 seconds to climb the 60 m . length of an escalator which is not working when in operation , the escalator lifts a passenger from bottom to top in 60 seconds . how much long does it take the child to cover the 60 meters, if she walks on the moving escalator ?\r<BR>\n" );
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document.write( "(A)  30 sec   (B)  36 sec  (C)  40 sec  (D)  45 sec  (E)  50 sec </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #225875 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=225875\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> it takes a child 90 seconds to climb the 60 m . length of an escalator which is not working when in operation ,<BR>\n" );
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document.write( "Child's rate = 60/90 = 2/3 m/sec<BR>\n" );
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document.write( " the escalator lifts a passenger from bottom to top in 60 seconds<BR>\n" );
document.write( "Escalator rate = 60m/60sec = 1 m/sec<BR>\n" );
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document.write( " . how much long does it take the child to cover the 60 meters, if she walks on the moving escalator ?<BR>\n" );
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document.write( "Rate of child and escalator together:<BR>\n" );
document.write( "(2/3) + 1 = 5/3 m/sec.<BR>\n" );
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document.write( "Time for child to move 60 meters on the moving escalator:<BR>\n" );
document.write( "time = distance/rate = 60 m/[(5/3)m/sec] = 12*3 sec = 36 sec<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "(A) 30 sec (B) 36 sec (C) 40 sec (D) 45 sec (E) 50 sec<BR>\n" );
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