document.write( "Question 1066676: A train leaves philadelphia at 5:00 PM. A second train leaves the same city in the same direction at7:00 PM. The second train travels 30 mph faster than the first. If the second train overtakes the first at 11:00 PM. What is the speed of the two trains. \n" ); document.write( "

Algebra.Com's Answer #681887 by josgarithmetic(39623) $\"\"$ $\"About$

You can put this solution on YOUR website!
Use time quantities instead of points in time.
\n" ); document.write( "

\r\n" );
document.write( "        SPEED         TIME        DISTANCE\r\n" );
document.write( "\r\n" );
document.write( "SLOW       r           4+2=6        d\r\n" );
document.write( "\r\n" );
document.write( "FAST      r+30         4            d\r\n" );
document.write( "

\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"system%28%28r%29%286%29=d%2C%28r%2B30%29%284%29=d%29\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The distances, each d, is the same.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"6r=4%28r%2B30%29\"$
\n" ); document.write( "Solve for r. \n" ); document.write( "

\n" );