document.write( "Question 757600: Two persons are to run a race, but one can run 11 meters per second, whereas the other can run 7 meters per second. If the slower runner has a 42-meter head start, how long will it be before the faster runner catches the slower runner, if they begin at the same time? \n" ); document.write( "

Algebra.Com's Answer #460947 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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Two persons are to run a race, but one can run 11 meters per second,
\n" ); document.write( " whereas the other can run 7 meters per second.
\n" ); document.write( " If the slower runner has a 42-meter head start, how long will it be
\n" ); document.write( " before the faster runner catches the slower runner, if they begin
\n" ); document.write( " at the same time?
\n" ); document.write( ":
\n" ); document.write( "We can us relative speed here which is 11 - 7 = 4 m/sec
\n" ); document.write( "How long would it take to cover 42 meters at this speed
\n" ); document.write( ":
\n" ); document.write( " $\"42%2F4\"$ = 10.5 sec
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "You can confirm this for yourself, find the distance traveded
\n" ); document.write( "10.5 * 11 = 115.5 m
\n" ); document.write( "10.5 * 7 = 73.5 m
\n" ); document.write( "--------------------
\n" ); document.write( "the difference: 42 m
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