SOLUTION: four concentric circles r given .the radius of 1st circle is x.next is 2x,then 3x and 4x. given that area b/w 2nd and 1st is A and 4th and 3rd circles being B.find ratio of A to
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Question 416720: four concentric circles r given .the radius of 1st circle is x.next is 2x,then 3x and 4x. given that area b/w 2nd and 1st is A and 4th and 3rd circles being B.find ratio of A to B
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
The area between circle 2 and circle 1 is the area of circle 2 minus the area of circle 1.
^2\ -\ \pi x^2\ =\ 4x^2\pi\ -\ x^2\pi\ =\ 3x^2\pi)
The area between circle 4 and circle 3 is the area of circle 4 minus the area of circle 3. Same deal as before.
^2\ -\ \pi(3x)^2\ =\ 16x^2\pi\ -\ 9x^2\pi\ =\ 7x^2\pi)
So
John
My calculator said it, I believe it, that settles it
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