Question

If area of a circle is 88cm then find the radius of the circle ​

Answer 1

Required Answer:-

Given:

• Area of a circle is 88cm²

To Find:

• The radius of the circle.

Solution:

We have,

➡ Area = 88cm²

Area of a circle is given by the formula,

➡ A = πr²

Let the radius of the circle be r.

Therefore, according to the given condition,

➡ πr² = 88

➡ 22/7 × r² = 88

➡ r² = 88 × 7/22

➡ r² = 4 × 7

➡ r = √28

➡ r = 2√7 cm.

★ Hence, the radius of the circle is equal to 2√7 cm.

Answer:

• Radius = 2√7 cm.

Verification:

Let's verify our result.

Here,

➡ r = 2√7 cm.

Therefore, area of the circle will be,

= 22/7 × 2√7 × 2√7

= 22/7 × 4 × 7

= 22 × 4 cm²

= 88cm²

Therefore, our answers are correct ☑.

Hence, Verified.

Answer 2

Given,

Area of circle = 88 cm^2

To find : Radius of circle r.

We know,

Area of circle = πr²

88  = 22/7 * r²

r² = 88 * 7 / 22

r = √28

or, r = 2√7 cm