document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=802869>Question 802869</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The distance between two stations A and B is 240km. Two trains leaved both stations at the same time and went towards each other: The A train, with 45km per hour and B train, with the speed of 35km per hour. And this is where it gets weird.. At the same time, from the station A, departed a little bird with the speed of 50km per hour, towards the B train. When the bird reached the B train, it flew back, towards the A train, reached the A train and flew back, towards the B train,etc, etc. <BR>\n" );
document.write( "Question: How many kilometers the bird flew in total, until the trains finally met each other? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #484043 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=484043\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The distance between two stations A and B is 240km. Two trains leaved both stations at the same time and went towards each other: The A train, with 45km per hour and B train, with the speed of 35km per hour. And this is where it gets weird.. At the same time, from the station A, departed a little bird with the speed of 50km per hour, towards the B train. When the bird reached the B train, it flew back, towards the A train, reached the A train and flew back, towards the B train,etc, etc. <BR>\n" );
document.write( "Question: How many kilometers the bird flew in total, until the trains finally met each other?\r<BR>\n" );
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document.write( "Looks weird but it is simple if you understand the logic\r<BR>\n" );
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document.write( "The two trains move towards each other. They meet.<BR>\n" );
document.write( "time they meet = d/r\r<BR>\n" );
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document.write( "r=35+45 =80 km/h<BR>\n" );
document.write( "distance =240 km\r<BR>\n" );
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document.write( "time = 240/80 = 3 hours\r<BR>\n" );
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document.write( "Time the trains take to meet is the time the bird is flying<BR>\n" );
document.write( "rate = 50 km/h\r<BR>\n" );
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document.write( "d= rt<BR>\n" );
document.write( "=50*3=150 km\r<BR>\n" );
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