document.write( "Question 628025: Two trains start from the same station at 10am one traveling east at 60mph one travelling west 70mph at what time will they be 455 miles aprt \n" ); document.write( "

Algebra.Com's Answer #395320 by josmiceli(19441) $\"\"$ $\"About$

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Think of one train as standing still and the other one
\n" ); document.write( "traveling away from it at the sum of their speeds
\n" ); document.write( "until they are 455 miles apart.
\n" ); document.write( " $\"+d+=+r%2At+\"$
\n" ); document.write( " $\"+455+=+%28+60+%2B+70+%29%2At+\"$
\n" ); document.write( " $\"+455+=+130t+\"$
\n" ); document.write( " $\"+t+=+455%2F130+\"$
\n" ); document.write( " $\"+t+=+3.5+\"$
\n" ); document.write( "3.5 hours after 10 AM is 1:30 PM \n" ); document.write( "

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