Question

find the circumference if the radius is 12 cm what is the formula?
class 5th​

Answer 1

Answer:

2pi r = 2× 22/7 × 12 = 75.42 cm

Answer 2

Given:

A circle with

• Radius - 12 cm

What To Find:

We have to circumference of the circle.

Formula:

$\tt{Circumference = 2\pi r}$

Solution:

Using the formula,

⇒ $\tt{Circumference = 2\pi r}$

Substitute the values,

⇒ $\tt{Circumference = 2 \times \dfrac{22}{7} \times 12}$

Multiply the 2, 22 and 12,

⇒ $\tt{Circumference =\dfrac{528}{7}}$

Convert into mixed fraction,

⇒ $\tt{Circumference =75\dfrac{3}{7}\:cm}$

∴ Therefore, the circumference of circle is $75\dfrac{3}{7}$ cm.