SOLUTION: Two concentric circles are drawn so that the inner circle is shaded. The shaded area is equal to the unshaded area. The radius of the outer circle is 12 cm. Find the difference in

Question 1101875: Two concentric circles are drawn so that the inner circle is shaded. The shaded area is equal to the unshaded area. The radius of the outer circle is 12 cm. Find the difference in the radii of the two circles.
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Just in all variables:
R, radius of outer, larger circle
r, radius of inner, shaded circle

The larger circle would be TWICE the area of the shaded smaller circle.

or

You can substitute for R to finish.
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