Question

The area of circle is 154 sq. cm then its radius is

The area of circle is 154 sq. cm then its radius is







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Answer 1

Answer:

$\rm\red{answer}$

• Area = 154 cm²

Area of circle = πr²

154 = 22/7 × r²

154 × 7/22 = r²

7 × 7 = r²

r² = 49

r = √49

r = 7

Therefore radius = 7 cm

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Answer 2

Given:-

Area of the circle is ${154}^{2} cm$

To Find:-

Radius of the circle.

Solution:-

let the radius of the circle be 'r' cm.

As we know that the formula to finding the area of circle is:-

$\large \boxed{ \red{\pi {r}^{2}}}$

On putting the values in the formula we get:-

Let the $\pi = \frac{22}{7}$

$\pi {r}^{2} = 154$

${r}^{2} = 154 \times \frac{7}{22}$

$= 49$

$= \sqrt{49}$

$= 7$

Hence, The radius of the circle with 154 sq cm is 7 cm.

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More To Know:-

Area of the circle = π × ${r}^{2}$

Diameter of a Circle = 2 × r

Circumference of a Circle = 2 × π × r

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