The perimeter of a circle having area 154 \sq. {\cm} is

Sainik School Entrance Exam 2021 Solved Paper

Question : 23 of 150

Marks: +1, -0

The perimeter of a circle having area

154 \sq. {\cm}

Solution:

(b) Area of circle

=\πr^2

\πr^2=154

⇒ r^2={154}/{22} × 7=7 ×7.

r=7 {\cm}

Perimeter of a circle

=2 πr=2 ×{22}/{7} ×7=44 {\cm}

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