document.write( "Question 1092774: Two trains leave the station at the same time, one heading west, the other heading east. The westbound train travels at a speed of 100 mph. The east bound train travels at a speed of 90 mph. how long will it take the two trains to be 456 mile apart?
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #707375 by ikleyn(52817) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "D1 = 100*t  is the \"distance\" equation for the first train.\r\n" );
document.write( "\r\n" );
document.write( "D2 =  90*t  is the \"distance\" equation for the second train.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "D1 + D2 = 456   (given)   =====>\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "100t + 90t = 456  ====>  (100+90)*t = 456  ====>  190t = 456  ====>  t =  hours = 2.4 hours = 2 hours and 24 minutes.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "-----------
\n" ); document.write( "On Travel and distance problems, read the lessons\r
\n" ); document.write( "\n" ); document.write( "- Travel and Distance problems \r
\n" ); document.write( "\n" ); document.write( "- Travel and Distance problems for two bodies moving in opposite directions \r
\n" ); document.write( "\n" ); document.write( "- Travel and Distance problems for two bodies moving in the same direction (catching up)\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );