document.write( "Question 1124953: Skip can run 1 m/s faster than Bo. Skip is also able to run across a field in 20 seconds, a full 2.5 seconds quicker than Bo. How fast can Skip run? \n" ); document.write( "

Algebra.Com's Answer #741271 by ikleyn(52873) $\"\"$ $\"About$

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document.write( "Let d be the size of the field and \"s\" be the Skip speed.\r\n" );
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document.write( "From the condition, you have\r\n" );
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document.write( "    d = 20s = 22.5*(s-1).      \r\n" );
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document.write( "From this equation,  \r\n" );
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document.write( "    20s = 22.5*(s-1)\r\n" );
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document.write( "you have  \r\n" );
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document.write( "    20s = 22.5s - 22.5\r\n" );
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document.write( "    2.5s = 22.5  ====>  s =  = 9 m/s  is the speed of Skip.\r\n" );
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document.write( "Check.  The field size is  9 m/s * 20 seconds = 180 meters;\r\n" );
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document.write( "        The speed of Bo  is  9-1 = 8 m/s.\r\n" );
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document.write( "        The time for Bo =  = 22.5 seconds.    ! Correct !\r\n" );
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