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Find the area of a circle whose radius is 7 cm.

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124 c m 2

134 c m 2

144 c m 2

154 c m 2

answer is D.

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Detailed Solution

Given a circle having radius 7 cm.
The area of a circle formula is,

A = π r 2

⇒ A = 227 × 7 × 7

⇒ A = 22 × 7

⇒ A = 154

Therefore, the area is

154 c m 2

.
Hence, option 4 is correct.

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