Question

Find the radius and the area of a circle whose circumference is 18πcm​

Answer 1

Answer :-

• Radius of the circle is 9cm.
• Area of the circle is 81πcm².

Given :-

• Circumference of a circle is 18πcm.

To Find :-

• Radius and area of the circle.

SoluTion :-

Here,

• Circumference of the circle is 18πcm

We know that the circumference of the circle is 2πr.

According to question :-

2πr = 18π

→ 2r = 18

→ r = 18/2

→ r = 9

Radius of the circle is 9cm.

Area of a circle is πr²

π × 9 × 9

→ 81πcm²

Hence,

• Radius of the circle is 9cm.
• Area of the circle is 81πcm².

_____________________

Answer 2

Answer:

28.28

Step-by-step explanation:

Circumference = 18πcm

formula of circumference = 2πr

2πr = 18πcm

18π=2πr=r=9 Ans

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