Question

find the diameter of a circle whose circumference is 220 cm​

Answer 1

Answer:

circumference = 220 CM

2πr = 220 cm

2*22/7*r = 220 CM

r = 220*7/ 2* 22

r = 35CM

Answer 2

Answer:

✮Formula used:

Circumference of the circle = 2πr

✮Solution:

Circumference= 220cm

$⇒2\pi r = 220cm$

$⇒2 \times \frac{22}{7} \times r = 220cm$

$⇒r = 220 \div \frac{44}{7}$

$⇒r = 220 \times \frac{7}{44}$

$⇒ \frac{1540}{44} \\ \\ ⇒35cm$

Therefore, The radius is 35cm.

Diameter = 2×Radius

⇒ Diameter = 2×35cm = 70cm.

Therefore, The diameter of the circle is 70cm.