SOLUTION: If the radius of a circle is increased by 2 cm, its area increases by 16PI square centimeters. What
is the original radius of the circle?
Algebra.Com
Question 657375: If the radius of a circle is increased by 2 cm, its area increases by 16PI square centimeters. What
is the original radius of the circle?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
If the original circle had a radius of 
, then the area of the original circle was 
.
The new circle then has a radius of 
, so the area of the new circle is ^2)
.
We are given that the difference between these two areas is 
, so:
^2\ -\ \pi{x^2}\ =\ 16\pi)
Solve for
John
My calculator said it, I believe it, that settles it
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