Question

Find the circumference of circle and area of circle whose radius is 7 cm.​

Answer 1

• Fact: circumference of a circle whose radius is r is given by 2πr

Here r=7 cm

Hence circumference of the circle =2π(7)=2⋅22/7.7=2.22=44cm

• Area of a circle =πr
• 2
• , where r is the radius of the circle
• Since r=7
• So, area of the given circle =π×7×7=49π

Answer 2

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• The circumference of the circle = 44cm.
• The area of the circle = 154cm².

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Given:-

• The radius of the circle as 7cm.

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To Find:-

• The circumference of the circle.
• The area of the circle.

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Solution:-

✎ To find the circumference of the circle ⭕

Formula Applied:-

⇾ (2πr) units.

After Substituting The Values:-

⇾(2×22/7×7)cm [ 7 gets cancelled. Then,]

⇾ (2×22)cm

⇾ 44cm

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✎ To find the area of the circle

Formula Applied:-

⇾ (πr²) sq. units.

After Substituting The Values:-

⇾ (22/7×7×7)cm²

⇾154cm²

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