Question

Calculate the circumference of a circle whose diameter is 70 cmgive formula steps by step

Answer 1

Answer:

The circumference of the circle is 220 cm

Step-by-step explanation:

Given :

Diameter of a circle is 70 cm

To find :

the circumference of the circle

Solution :

We know,

The diameter is twice the radius.

 i.e, d = 2r

So,

70 cm = 2r

r = 70/2

r = 35 cm

Therefore, the radius of the circle is 35 cm

Circumference of the circle = 2πr

 $\sf Circumference=2 \times \dfrac{22}{7} \times 35 \\\\ \sf Circumference=2 \times \dfrac{22}{7} \times 7 \times 5 \\\\ \sf Circumference=2 \times 22 \times 5 \\\\ \sf Circumference=44 \times 5 \\\\ \sf Circumference=220 \ cm$

The circumference of the circle is 220 cm