document.write( "Question 685085: A boy leaves on a bicycle trip at the rate of 8 mph. One hour later the father, realizing that his son forgot his camping gear, sets out by car. How fast must the father drive to overtake the boy in 15 minutes? \n" ); document.write( "

Algebra.Com's Answer #424328 by Edwin McCravy(20055) $\"\"$ $\"About$

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A boy leaves on a bicycle trip at the rate of 8 mph. One hour later the father, realizing that his son forgot his camping gear, sets out by car. How fast must the father drive to overtake the boy in 15 minutes?\r
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document.write( "Suppose the father has to travel at x mph.  One hour later the son is \r\n" );
document.write( "8 miles up the road.  The father's approach rate is x-8 mph.  15 minutes\r\n" );
document.write( "converted to hours is  hour.  Since DISTANCE = RATE×TIME,\r\n" );
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document.write( "             8 = (x-8)\r\n" );
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document.write( "Multiply both sides by 4\r\n" );
document.write( "    \r\n" );
document.write( "            32 = x - 8\r\n" );
document.write( "            40 = x\r\n" );
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document.write( "The father must drive 40 mph.\r\n" );
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document.write( "Edwin

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