document.write( "Question 62030: When a train left Podunck and traveled West 70 KM/H, 2 hours later, another train left Podunck and traveled East at 90KM/H, how many hours had the first train traveled when they were 1420 KM apart? \n" ); document.write( "
Algebra.Com's Answer #42772 by Nate(3500)\"\" \"About 
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First Train:
\n" ); document.write( "Rate: 70km/h
\n" ); document.write( "Time: t + 2
\n" ); document.write( "Second Train:
\n" ); document.write( "Rate: 90km/h
\n" ); document.write( "Time: t
\n" ); document.write( "The sum of the two train's distances is equal to the total distance between the two.
\n" ); document.write( "Distance = Rate * Time
\n" ); document.write( "First Train:
\n" ); document.write( "70(t + 2)
\n" ); document.write( "70t + 140
\n" ); document.write( "Second Train:
\n" ); document.write( "90(t)
\n" ); document.write( "90t
\n" ); document.write( "70t + 140 + 90t = 1420
\n" ); document.write( "160t = 1280
\n" ); document.write( "t = 8
\n" ); document.write( "First Train:
\n" ); document.write( "Rate: 70km/h
\n" ); document.write( "Time: t + 2 = 8 + 2 = 10
\n" ); document.write( "Second Train:
\n" ); document.write( "Rate: 90km/h
\n" ); document.write( "Time: t = 8 \n" ); document.write( "
\n" );