Question

the circumference of a circle is 97.2 cm. find its diameter and radius​

Answer 1

Answer:

The circumference of a circle is 97.2 cm.

diameter d= 30.95 cm

and radius​ r = 15.48 cm

Step-by-step explanation:

Given: The circumference of a circle = 97.2 cm.

Find: diameter and radius​

Formula:

The circumference of a circle =  πd = 2 πr

Step 1: To find diameter use the following formula

The circumference of a circle =  πd

πd = 97.2

3.14× d = 97.2

d =97.2 ÷ 3.14

d= 30.95 cm

Step 1: To find radius use the following formula

The circumference of a circle =   2 πr

2 × 3.14 × r = 97.2

6.28  × r = 97.2

r = 97.2 ÷ 6.28

r = 15.48 cm

Answer 2

Answer:

Radius of the circle is 15.47 cm. and diameter is 30.94 cm.

Step-by-step explanation:

Given:

Circumference of the circle = 97.2 cm.

Let radius of the circle = r cm.

As we know that,

Circumference of circle = $2\pi r$

                        97.2 = 2 × (22 /7 ) × r         (where $\pi$= 22 / 7)

                       (97.2 × 7) / (2 × 22) = r

                         680.4 / 44 = r

                                15.47 = r

Radius of the circle = 15.47 cm.

Diameter of the circle = 2r = 2 × 15.47 =30.94 cm.