Question

Area of Circle is 154 cm square find its circumference​

Answer 1

Refer the attachment above ...

Answer 2

Solution

Given :-

• Area of circle = 154 cm

Find :-

• Circumference of circle

Explanation

Using Formula

$\boxed{\tt{\red{\:Area_{circle}\:=\:πr^2}}}$

$\boxed{\tt{\orange{\:Circumference_{circle}\:=\:2πr}}}$

Where,

• r is radius of circle

According to question,

➡ Area of circle = πr²

➡154 = πr²

➡154 = 22/7 × r²

➡r² = 154 × 7/22

➡r² = 1078/22

➡r² = 49

➡r = √(49)

➡r = 7

Since

• Radius of circle will be r = 7 cm

Now, Calculate Circumference of circle.

➡ Circumference of circle = 2πr

[ π = 22/7 ]

➡ Circumference of circle = 2 × 22/7 × 7

➡ Circumference of circle = 44 cm

Hence

• Circumference of circle will be = 44 cm

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