SOLUTION: Please help me solve this problem in Geometry. A metal washer 4 cm in diameter is pierced with a 1.75 cm hole. What is the surface area of the washer in inches? Thank you.

Question 792706: Please help me solve this problem in Geometry.
A metal washer 4 cm in diameter is pierced with a 1.75 cm hole. What is the surface area of the washer in inches?
Thank you.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A metal washer 4 cm in diameter is pierced with a 1.75 cm hole. What is the surface area of the washer in inches?
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Area of a circle = pi*r^2
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Equation:
p*2^2 - pi*0.875^2 = pi[4-0.7656]
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= [pi*3.2344] cm^2}[1/2.54}^2
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= 1.5750 in^2
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Cheers,
Stan H.
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