The area of a circle is <span>πr² the outer circle area = </span><span>π 4x² the inside circle area = </span>π.6²=36<span>π </span>the outer circle area - <span>the inside circle area = </span><span>he shaded region </span>π 4x² - 36π =<span>220π cm2 it implies x²-9 =55 and x²=64, and x =sqrt(64)=8 the value of x is 8</span>