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Maxima and Minima help!! (2 Viewers)

missgraceful

What a joke..
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A magazine advertisement is to contain 50cm^2 of lettering with clear margins of 4cm each at top and bottom and 2cm at each side. Find the overall dimensions if the total area of the advertisement is to be a minimum.

I really can't get this.
Any help would be much appreciated. :)
 

Drongoski

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First of all is the dimension: 9 cm x 18 cm ?
 
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