document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=477077>Question 477077</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A person is riding on a ferris wheel that turns at a constant speed. The lowest point of the wheel is at the ground level. Another person is standing at the side of the wheel on a platform 4 m above the ground. She notes the times the person on the wheel is on the same level as she is. the intervals between 2 successive times they are on the same level is 6 sec and 18 sec. \r<BR>\n" );
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document.write( "What is the radius of the wheel? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #327148 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=327148\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A person is riding on a ferris wheel that turns at a constant speed.<BR>\n" );
document.write( " The lowest point of the wheel is at the ground level.<BR>\n" );
document.write( " Another person is standing at the side of the wheel on a platform 4 m above the ground.<BR>\n" );
document.write( " She notes the times the person on the wheel is on the same level as she is. <BR>\n" );
document.write( "the intervals between 2 successive times they are on the same level is 6 sec and 18 sec.<BR>\n" );
document.write( "What is the radius of the wheel?<BR>\n" );
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document.write( "From the description of the ferris wheel, we can say a complete rev = 24 sec:<BR>\n" );
document.write( "the point on the wheel from the lowest point to 4 m above ground takes 3 sec.<BR>\n" );
document.write( "The time from the lowest point to the highest point takes 12 sec, let this = 2r<BR>\n" );
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document.write( "Assume the relationship to be: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282r%29%2F4 ALIGN=MIDDLE  ALT=\"%282r%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12%2F3 ALIGN=MIDDLE  ALT=\"12%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cross multiply<BR>\n" );
document.write( "3(2r) = 4 * 12<BR>\n" );
document.write( "6r = 48<BR>\n" );
document.write( "r = 8 m is the radius of the wheel </SPAN>\n" );
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