Question

Find the area of ring formed between two concentric circles whose redii are 9 cm and 5cm​

Answer 1

$\sf{\huge{\underline{\orange{Given :-}}}}$

• Two concentric circles whose radii are 9 cm and 5cm.

$\sf{\huge{\underline{To\:Find :-}}}$

• The area of ring formed .

$\sf{\huge{\underline{\green{Answer :-}}}}$

We are having a concentric circle means two circle of different radius from a fixed point.

• Radius of the first circle = 9 cm

• Radius of the second circle = 5cm

We know that the area of concentric circle is

➝ π R² - π r²

➝ π ( R² - r² )

➝ π ( 9² - 5² )

➝ π ( 81 - 25 )

➝ π × 56

➝ 22/7 × 56

➝ 22 × 8

➝ 176 cm²

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