document.write( "Question 423996: 2 trains left the same station at the same time. Train A traveled north at 28mph and train B traveled south at 52mph. how much time passed before they were 320mi apart? \n" ); document.write( "
Algebra.Com's Answer #295669 by mananth(16946)\"\" \"About 
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two trains going away \r
\n" ); document.write( "\n" ); document.write( "add their speeds 28+52= 80 mph.\r
\n" ); document.write( "\n" ); document.write( "Distance =320 mi\r
\n" ); document.write( "\n" ); document.write( "time = d/r
\n" ); document.write( "t= 320/80
\n" ); document.write( "t= 4 hours. \r
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