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Find the area of a circle whose diameter is $5.6 m$ .

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21.64 m 2

22.64 m 2

23.64 m 2

24.64 m 2

answer is D.

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Detailed Solution

Given a circle having diameter 5.6 m.
The radius of circle is,

⇒ r = 5.6 2

⇒ r = 2.8 m

Area of the circle is,

A = π r 2 ⇒ A = 227 × 2.8 × 2.8

⇒ A = 22 × 0.4 × 2.8

⇒ A = 24.64 m 2

Therefore, the area of the circle is

24.64 m 2

.
Hence, option 4 is correct.

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