SOLUTION: 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 t

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: 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 t      Log On

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Question 1097473: 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
Found 2 solutions by ikleyn, stanbon:
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
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The area of a circle is Area = pi%2A%28d%2F2%29%5E2, where pi = 3.14 and d is the diameter.

The area of the remaining glass is the difference of the areas of the two circles.



Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
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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