document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1209198>Question 1209198</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi<BR>\n" );
document.write( "It took a train 65 seconds from starting to cross an iron bridge of length 1440m to completely pass over the bridge. It also took the train 75 seconds from when it entered a 1680m tunnel to completely pass through the tunnel. <BR>\n" );
document.write( "Find the length and speed of the train.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #847810 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=847810\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> it took a train 65 seconds from starting to cross an iron bridge of length 1440m to completely pass over the bridge. It also took the train 75 seconds from when it entered a 1680m tunnel to completely pass through the tunnel.<BR>\n" );
document.write( "Find the length Letand speed of the train.\r<BR>\n" );
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document.write( "Let speed of train be x m  <BR>\n" );
document.write( "Let length of train be y m\r<BR>\n" );
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document.write( "Length of bridge be 1440 s\r<BR>\n" );
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document.write( "distance to cover = (y+1440)\r<BR>\n" );
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document.write( "time =65 s<BR>\n" );
document.write( "65 = (y+1440)/x\r<BR>\n" );
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document.write( "65x = y+1440<BR>\n" );
document.write( "65x-1440 =y..................1\r<BR>\n" );
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document.write( "For the other bridge\r<BR>\n" );
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document.write( "75 = (y+1680)/x\r<BR>\n" );
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document.write( "75x = y+1680<BR>\n" );
document.write( "y= 75x -1680.............2\r<BR>\n" );
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document.write( "Equate both equations\r<BR>\n" );
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document.write( "75x-1680 = 65x - 1440<BR>\n" );
document.write( "Rearrange\r<BR>\n" );
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document.write( "75x-65x = 1680-1440\r<BR>\n" );
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document.write( "10x = 240 <BR>\n" );
document.write( "x =24 m/s<BR>\n" );
document.write( "Speed of train = 24m/s\r<BR>\n" );
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document.write( "Plug value of x in 65x-1440 =y\r<BR>\n" );
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document.write( "65*24 -1440 = y <BR>\n" );
document.write( "y=120 m \r<BR>\n" );
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document.write( "Length of train is 120 m\r<BR>\n" );
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document.write( " </SPAN>\n" );
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