document.write( "Question 344628: 2. Two runners start at the same point and run in opposite directions. One runs at 6 miles per hour and the other runs at 8 miles per hour. In how many hours will they be 21 miles apart?
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Algebra.Com's Answer #246572 by mananth(16946)\"\" \"About 
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since they are running in opposite directions their effective speed will be 6+8 =14 mph.
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\n" ); document.write( "\"time+=+distance+%2F+speed+\"
\n" ); document.write( "=21/14
\n" ); document.write( "=1.5 hours
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