Question 1061380
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A mirror with radious 49 cm has a wooden frame of thickness 70 mm . how mich area of the mirror is covered with the frame.  
What is the visible area of mirror. 
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Visible area is {{{pi*(49-7)^2}}} cm^2.  Calculate.


Covered area is {{{pi*49^2 - pi*42^2}}} cm^2. Calculate.