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 #42771 by ankor@dixie-net.com(22740)\"\" \"About 
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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?
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\n" ); document.write( "Let t = westbound train time:
\n" ); document.write( "Let (t-2) = eastbound train time:
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\n" ); document.write( "Dist = speed * time
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\n" ); document.write( "70t + 90(t-2) = 1420
\n" ); document.write( "70t + 90t - 180 = 1420
\n" ); document.write( "160t = 1420 + 180
\n" ); document.write( "160t = 1600
\n" ); document.write( "t = 1600/160
\n" ); document.write( "t = 10 hrs the westbound train:
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\n" ); document.write( "Check: 70(10) + 90(8) = 1420
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