Question

find the area of circles whose radius are 10.5cm​

Answer 1

Given

• Radius of circle = 10.5 cm.

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To Find

• Area of circle.

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Solution

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★ Formula used

$\boxed{\sf{ \color{darkgreen}{Area~ of~ Circle = \pi r^2 }}}$

${ \qquad{ \rule{5000pt}{2.2pt}}}$

⠀★Calculating The Area :

${\sf{\dashrightarrow{Area = \pi r^2}}} \\ \\{\sf{\dashrightarrow{\dfrac{22}{7}\times 10.5\times 10.5}}}\\ \\{ \sf{\dashrightarrow{22\times 1.5\times 10.5}}} \\ \\{ \sf{\dashrightarrow{346.5}}} \\ \\{ \dashrightarrow{ \boxed{ \sf{ \frak{ \color{pink}{346.5 cm^2}}}}}}$

${ \qquad{ \rule{5000pt}{2.2pt}}}$

Therefore

• Area of circle will Be 346.5 cm²

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$\large \sf{ \red{@} \green{Fairy \blue{Prin} \pink{cess \orange❀}}}@FairyPrincess❀$

Answer 2

Area of a circle = πr² = 22/7 × 10.5 × 10.5 = 346.5 cm²

Or, Area of a circle = 22/7 × 10.5 × 10.5

Or, Area of a circle = 346.5 cm²

Circumference of a circle = 2πr

Or, Circumference of a circle = 2 × 22/7 × 10.5

Or, Circumference of a circle = 66 cm

Therefore, the area of a circle = 346.5 cm² and the circumference of a circle = 66 cm