document.write( "Question 1145150: An 18-year-old runner can complete a 10.0-km course with an average speed of 4.74 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.17 m/s. How much later (in seconds) should the younger runner start in order to finish the course at the same time as the older runner? \n" ); document.write( "

Algebra.Com's Answer #766363 by ikleyn(52790) $\"\"$ $\"About$

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document.write( "First find the time for the 18-years old runner. \r\n" );
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document.write( "It is    =   seconds.\r\n" );
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document.write( "Next find the time for the 50-years old runner.  \r\n" );
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document.write( "It is   =   seconds.\r\n" );
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document.write( "The difference  -  will be your answer, in seconds.\r\n" );
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