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Find the area of a circle whose radius is $2.1 m$ .

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10.86 m 2

12.86 m 2

13.86 m 2

15.86 m 2

answer is C.

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Detailed Solution

Given a circle having radius 2.1 m.
The area of a circle is,

A = π r 2

By substituting radius in the given formula, we get

⇒ A = 227 × 2.1 × 2.1

⇒ A = 22 × 0.3 × 2.1

⇒ A = 13.86

Therefore, the area is

13.86 m 2

.
Hence, option 3 is correct.

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