Question

find the radius of a circle whose circumference is 132 CM

Answer 1

Heya!!

Circumference of circle = 132 cm.

Let the radius of circle be 'r'

Then,

Circumference of circle = 2*pi*r

=) 132 = 2*22/7 *r

=) 132 = 44/7 * r

=) r = ( 132*7)/44

=) r = 3*7

=) r = 21 cm

Hence, the radius of circle is 21 cm.

Hope it helps u :)

Answer 2

The radius of circle is 21 cm.

Given:

• Circumference of circle is 132 cm.

To find:

• Radius of circle.

Solution:

Formula to be used:

• Circumference of circle: 2πr

Step 1:

Equate given circumference with the formula.

$2\pi \: r = 132$

or

$r = \frac{132}{2\pi}$

Step 2:

Put the value of π and solve

$r = \frac{132 \times 7}{22 \times 2}$

or

$\bf \red{r = 21 \: cm}$

Thus,

The radius of circle is 21 cm.

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