Question

What is the area of the circle, the circumference of which is equal to the perimeter of a square of side 11cm.

Answer 1

Answer:

The area of circle is 154 cm².

Step-by-step explanation:

The side length of square is 11 cm.

Perimeter of square is

$P=4a=4\times 11=44$

Perimeter of square is 44 cm.

The circumference of the circle is equal  to the perimeter of square.

$C=44$

$2\pi r=44$

$2(\frac{22}{7})r=44$

$r=7$

The radius of circle is 7 cm.

The area of a circle is

$A=\pi r^2$

$A=(\frac{22}{7})\times 7^2=154$

Therefore the area of circle is 154 cm².

Answer 2

Answer

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