Question

Find the radius of the biger
circle if the area of the ring is &
164 pie and the area of the smaller cicle is 61 cm²

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Answer 1

Answer:

Area of Ring = Area of bigger circle - Area of smaller circle

96 π = x - 34 π

x = 34 π + 96 π cm²

x = 130 π

Now,

Find the radius of the bigger circle :-

Area of circle = π r²

πr² = 130 π

r² = 130

r = √130 = 11.40 approx.

Hence,

The radius of the bigger circle = 11.40 cm

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