Question

Find the circumference of a circle whose area is 154 cm^2.
please answer me fast .​

Answer 1

Answer:

a=pie radius square

154*7/22=r square

49root=r

7=r

circumference=2*22/7*7=44

Answer 2

Given:-

• Area of circle = 154 cm²

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To find:-

• Circumference of circle.

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Solution

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We need Radius of circle for finding circumference of circle.

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We know that ,

☘ Area of circle = πr²

In which r is Radius of circle.

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So,

⇒πr² = 154

⇒ r² = 154 × 7 / 22

⇒ r² = 1078/22

⇒ r² = 49

⇒r = √49

⇒r = 7

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Verification:-

⇒πr² = 154

• Put r = 7

⇒π(7)² = 154

⇒22/7 × 7 × 7 = 154

⇒22 × 7 = 154

⇒154 = 154

Hence, verified

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Radius of circle = 7 cm.

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☘ Circumference of circle = 2πr

⇒2 × 22/7 × 7

⇒2 × 22

⇒44 cm.

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Therefore, Circumference of circle is 44 cm.