Question

The
If the area of a circle
an of a circle is 24.64 cm² find its radius and circumference
​

Answer 1

★ Given Data :

• Area of Circle = 24.64 cm²

★ To Find :

• Radius of the Circle
• Circumference of the Circle

★ Solution :

We know : Area of Circle = πr²

➠ 24.64 cm² = πr²

➠ 24.64 cm² = 22/7 × r²

➠ 24.64 cm² = 22r²/7

➠ 24.64 cm² × 7 = 22r²

➠ 172.48 cm² = 22r²

➠ 172.48/22 cm² = r²

➠ 7.84 cm² = r²

➠ r = √7.84 cm

➠ Radius = 2.8 cm

Also : Circumference of Circle = 2πr

➠ Circumference of Circle = 2 × 22/7 × 2.8 cm

➠ Circumference of Circle = 44/7 × 2.8 cm

➠ Circumference of Circle = 44/1 × 0.4 cm

➠ Circumference of Circle = 44 × 0.4 cm

➠ Circumference of Circle = 17.6 cm