SOLUTION: A lamp with a circular base 14cm in diameter was on a square mat with an area of 196 cm squared. How many cm square of the mat were uncovered?

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Question 519173: A lamp with a circular base 14cm in diameter was on a square mat with an area of 196 cm squared. How many cm square of the mat were uncovered?
Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
A lamp with a circular base of 14 cm will have a radius of 7 cm.
The area will be pi*r^2 = 49 pi = 153.9
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The area of the square mat is 196 cm^2..
Each side = sqrt(196) = 14 cm.
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196-153.9 = 42.1 cm^2 will be uncovered.
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