document.write( "Question 736247: A man drives a car a distance of 200 km at an average speed of 44 km/h. What must be his average speed for the next 220 km if he is to cover the total distance in 9 hours?
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Algebra.Com's Answer #449777 by Edwin McCravy(20055) $\"\"$ $\"About$

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A man drives a car a distance of 200 km at an average speed of 44 km/h. What must be his average speed for the next 220 km if he is to cover the total distance in 9 hours?
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document.write( "He wants to have gone the entire 420 miles in 9 hours. \r\n" );
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document.write( "He has driven 200 km at 44 km/h.\r\n" );
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document.write( "Since , he has spent  or  or  hours.\r\n" );
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document.write( "So he has 220 miles to go, and he has 9- or  or  hours left. So since ,\r\n" );
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document.write( "                   = × =  or  km/hr.\r\n" );
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document.write( "                  He must go  km/hr.\r\n" );
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document.write( "Edwin

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