<PRE><B>Question 1097473</B>
A circular piece of glass has a circular hole cut out of it to fit a fan. the glass has a diameter of 700cm and the hole has a diameter of 140cm. what is the area of the hole and the total area of the remaining glass 
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Area of glass:: pi*350^2
Area of hole:: pi*70^2
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Area of remaining glass:: pi(350^2-70^2) cm^2
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Cheers,
Stan H.
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