document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=980517>Question 980517</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Good day, can you help me in this trigonometry problem please?\r<BR>\n" );
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document.write( "Each tire on a truck has a radius of 18 inches.  The tires are rotating at 500 revolutions per minute.  Find the speed of the truck to the nearest mile per hour.\r<BR>\n" );
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document.write( "Thank you..... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #601640 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52841)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=601640\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "Let us find the circumference &nbsp;(the length of the circle)&nbsp; of the radius &nbsp;r = 18 inches.\r<BR>\n" );
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document.write( "It is &nbsp;&nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Api%2Ar ALIGN=MIDDLE  ALT=\"2%2Api%2Ar\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 2*3.14*18 =  113.04 inches.\r<BR>\n" );
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document.write( "So, &nbsp;when the wheel of the truck makes one rotation &nbsp;(one revolution), &nbsp;the truck moves &nbsp;113.04&nbsp; inches ahead.\r<BR>\n" );
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document.write( "When the wheel of the truck makes &nbsp;500&nbsp; rotations, &nbsp;the truck moves &nbsp;500*113.04 = 56520&nbsp; inches ahead. &nbsp;It is &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=56520%2F12 ALIGN=MIDDLE  ALT=\"56520%2F12\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 4710 feet.\r<BR>\n" );
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document.write( "So, &nbsp;the speed of the truck is &nbsp;4710 feet per minute. \r<BR>\n" );
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document.write( "It is &nbsp;4710*60 = 282600 feet per hour, &nbsp;or &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=282600%2F3 ALIGN=MIDDLE  ALT=\"282600%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 94200&nbsp; yards per hour. &nbsp;(Reminder: &nbsp;1 yard = 3 feet). \r<BR>\n" );
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document.write( "Now, &nbsp;to convert this speed to miles per hour, &nbsp;we need to divide the value of &nbsp;94200&nbsp; by &nbsp;1760, &nbsp;because &nbsp;1 mile = 1760 yards &nbsp;(see the &nbsp;<A  rel=nofollow HREF=https://en.wikipedia.org/wiki/Mile>article</A>&nbsp; from Wikipedia). \r<BR>\n" );
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document.write( "In this way you get the speed of &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=94200%2F1760 ALIGN=MIDDLE  ALT=\"94200%2F1760\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 53.52 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=mi%2Fh ALIGN=MIDDLE  ALT=\"mi%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "<B>Answer</B>. &nbsp;The speed of the truck is &nbsp;54 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=mi%2Fh ALIGN=MIDDLE  ALT=\"mi%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" > &nbsp;(approximately). \r<BR>\n" );
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