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ziro4ka [17]
3 years ago
5

In the diagram, the radius of the outer circle is

Mathematics
1 answer:
alukav5142 [94]3 years ago
7 0

Answer:

the area of a circle is πr²

the outer circle area = π 4x²

the inside circle area = π.6²=36π

the outer circle area - the inside circle area = he shaded region

π 4x² - 36π =220π cm2 it implies x²-9 =55 and x²=64, and x =sqrt(64)=8

the value of x is 8

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