Question

Q.9)Find the area of the circle with radius 28cm(take n=22/7)​

Answer 1

$area \: \: \: of \: \: \: a \: \: \: circle \: \: \: = \pi {r}^{2} \\ \\ = \frac{22}{7} \times 28 ^{2} \\ \\ = \frac{22}{7} \times 28 \times 28 \\ \\ = 22 \times 4 \times 28 \\ \\ = 2464$

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Answer 2

Correct Question?

›»› Find the area of the circle with radius 28 cm (take π = 22/7)

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Answer :

›»› The Area of circle = 2464 cm²

Given :

• Radius of a circle = 28 cm

To Find :

• Area of a circle = ?

How To Find?

Before we start how to find Area of circle, Let's first know about a circle.

• Circle is a round shape shaped figure.
• Circle has no corners or edges.
• A circle can be defined as a closed, two-dimensional curved shape.
• A circle has 5 part : Diameter, Chord, Radius, Arc, Tangent.

Let's know how to find...

We can find Area of circle by using the formula of Area which says Area = πr²

Here,

• The value of π is 22/7
• r is the Radius of circle in cm.

Let's solve this question...

Required Solution :

$\tt{: \implies Area = \pi {r}^{2}}$

$\tt{:\implies Area = \dfrac{22}{7} \times {28}^{2} }$

$\tt{:\implies Area = \dfrac{22}{ \cancel{ \: 7 \: }} \times \cancel{784}}$

$\tt{:\implies Area = 22 \times 112}$

$\bf{:\implies \boxed{ \boxed{ \red{ \bf{Area = 2464 \: {cm}^{2} }}}}}$

║Hence, the Area of circle is 2464 cm².║