Question 206955
Consider an area of cm2 bounded by two concentric circles ( the figure is called an annulus). Determine the radius of the inner circle ( in units of cm) if the outer and the inner diameters of the of the annulus differ by 2 cm.
------------------------------
Draw the picture.
Area of the annulus is ? cm^2/
----
You did not post the area of the annulus
Cheers,
Stan H.