Question

the area of a circle is 394.24cm find it's circumference​

Answer 1

Answer:

Step-by-step explanation:

Given: Area of circle = 394.24 sq. units

⇒ π (radius)² = 394.24 sq. units

⇒ $\frac{1}{2}$ (radius)² = 394.24 sq. units

⇒ (radius)² = $\frac{394.24 * 7}{22}$

= 125.44 sq. units

⇒ radius = 11.2 units

Answer 2

It is given that the area of the circle is 394.24 cm²

We know that area of a circle is πr²

So πr² = 394.24

π = 3.14

3.14 × r² = 394.24

r² = 394.24 ÷ 3.14

r² = 125.55

r = √125.55

r = 11.20 cm

Now, we know circumference is equal to 2πr

So C = 2πr

C = 2 × 3.14 × 11.2

C = 70.336 cm

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