document.write( "Question 1098064: A courier who goes at the rate of 7.5 mi./h is followed, after 2.0 h, by another who goes at the rate of 8.5 mi./h. In how many hours will the second overtake the first? \n" ); document.write( "

Algebra.Com's Answer #712484 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "The second courier started when the distance between them was 2*7.5 = 15 miles.\r\n" );
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document.write( "The distance between them decreases at the rate of 1 mile per hour. (8.5-7.5 = 1).\r\n" );
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document.write( "Having this, everybody can conclude that the answer is 15 hours.\r\n" );
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\n" ); document.write( "\n" ); document.write( "For this type of problems, \"catching up\" problems, see the lessons\r
\n" ); document.write( "\n" ); document.write( " - Travel and Distance problems \r
\n" ); document.write( "\n" ); document.write( " - Travel and Distance problems for two bodies moving in the same direction (catching up)\r
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