Question

The cicunference of the circle is 66cm its radius and diametrr is

Answer 1

Answer:

radius= 10.5 and diameter=21

Step-by-step explanation:

c = 2πr

66=2*(22/7)*r

(33*7)/22=r

21/2=r

therefore r=10.5

d=2r

d=2*10.5

d=21

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Answer 2

Radius is 10.5cm.

Diameter is 21cm.

Step-by-step explanation:

Given that

Circumference of circle is 66cm

To find

radius and diameter of circle

Solution

As we know that

$circumference \: of \: circle = 2 \times \pi \times radius$

Let c as circumference of circle

r as radius of circle

hence

$r = \frac{66}{2 \times \pi}$

$\pi = \frac{22}{7}$

$r = 10.5cm$

hence Radius of circle is 10.5cm

As we know that diameter is always two times of its radius hence

$diameter = 2 \times 10.5 \\ = 21cm$

Hence diameter is 21cm.