document.write( "Question 1066545: David Leaves home for his school at a speed of 12 mph. Twenty minutes later his father starts following him at a rate of 36 mph. How long(in minutes) will the father take to catch up with David? \n" ); document.write( "

Algebra.Com's Answer #681730 by ikleyn(52830) $\"\"$ $\"About$

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document.write( " =  =  hour = 10 minutes.\r\n" );
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\n" ); document.write( "\n" ); document.write( "4 is 4 miles = 12 mph * $\"1%2F3\"$ hour.
\n" ); document.write( "It is the distance for David be ahead at the moment the father started his move.\r
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\n" ); document.write( "\n" ); document.write( "36 - 24 in the denominator is the relative speed.\r
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