Question

the area of a circle is 24.64 cm^2 the circumference of the circle is

Answer 1

area = 2 pi r sq
r =24.64×7/22×2=3.92 cm sq.
circumference =2×22/7×392/100=24.64 cm

Answer 2

★ 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