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Answer: ∴ Diameter of given circle=41×2=82cm
Step-by-step explanation:
Area of the circle = sum of area of two circles
πR
2
=π×40
2
+π×9
2
⇒R
2
=1600+81=1681
∴R=
1681
=41cm
∴ Diameter of given circle=41×2=82cm
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Answer:
2√539/√ 176
Step-by-step explanation:
area = πr²
77/8 = 22/7 r²
r² = 77/8 * 7/ 22
r² = 539/ 176
r =√539/ 176
now
diameter = 2r
= 2 * √ 539/176
= 2√539/√ 176
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