document.write( "Question 1076402: it is 280 miles from Memphis to Birmingham. An expres train left Memphis traveling towards Birmingham at 70 mi/h. Two hours earlier a freight train left Birmingham traveling towards Memphis on a parallel track. The speed of this train was 50 mi/h. How long was it before the two trains meet? \n" ); document.write( "
Algebra.Com's Answer #691037 by jorel1380(3719)![]() ![]() You can put this solution on YOUR website! Let t be the time it takes, in hours, for the trains to meet. The freight train has a two hour head start, at 50 mph. So: \n" ); document.write( "70t+50t+100=280 \n" ); document.write( "120t=180 \n" ); document.write( "t=180/120 or 3/2 hours after the express train left Memphis before the two trains meet. ☺☺☺☺ \n" ); document.write( " |