document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=954012>Question 954012</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An aeroplane flies from A to B at a speed of 750km/h. On the returnn trip there was a strong tail wind and airplane flew at 900km/h. The return trip took 20min less than original. How many hours did the return trip take? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #582661 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=582661\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> R=900<BR>\n" );
document.write( "r=750<BR>\n" );
document.write( "t, unknown time length going A to B.<BR>\n" );
document.write( "k=1/3 hour, how much time less on returning, B to A<BR>\n" );
document.write( "Question asks for t-1/3;<BR>\n" );
document.write( "Understand that 20 minutes is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F3 ALIGN=MIDDLE  ALT=\"1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > of an hour.\r<BR>\n" );
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document.write( "_________________speed__________time________distance<BR>\n" );
document.write( "GOTO_____________r_______________t__________d<BR>\n" );
document.write( "BACK_____________R_____________t-k________d\r<BR>\n" );
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document.write( "Basic uniform rates of travel fact, RT=D\r<BR>\n" );
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document.write( "EQUATIONS:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28rt=d%2CR%28t-k%29=d%29 ALIGN=MIDDLE  ALT=\"system%28rt=d%2CR%28t-k%29=d%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=rt=R%28t-k%29 ALIGN=MIDDLE  ALT=\"rt=R%28t-k%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=rt=Rt-Rk ALIGN=MIDDLE  ALT=\"rt=Rt-Rk\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Rt-rt=Rk ALIGN=MIDDLE  ALT=\"Rt-rt=Rk\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=Rk%2F%28R-r%29 ALIGN=MIDDLE  ALT=\"t=Rk%2F%28R-r%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "What is really wanted, if keeping in symbols first, is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t-k=%28Rk%29%2F%28R-r%29-k ALIGN=MIDDLE  ALT=\"t-k=%28Rk%29%2F%28R-r%29-k\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28t-k=highlight%28r%2F%28R-r%29%29%29 ALIGN=MIDDLE  ALT=\"highlight%28t-k=highlight%28r%2F%28R-r%29%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Substitute the values to finish.<BR>\n" );
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