Question

The circumference of a circle whose radius is 7.2 cm

Answer 1

Answer:

circumference of a circle=2πr

=2*22/7*7.2

=316.8/7

=45.25cm

Step-by-step explanation:

Answer 2

Answer:

The circumference of the circle is $45.25$ cm.  

Step-by-step explanation:  

In context to the question asked,    

We have to find the circumference of a circle,  

As per data given in the question,    

We have,  

Radius ( r ) = $7.2$ cm  

For calculating the circumference of the circle,  

The formula to be used,  

Circumference of circle = $2\pi r$  

By substituting the values in the above formula,  

$=> 2\times \frac{22}{7}\times 7.2$

Now, expressing $(2\times \frac{22}{7})$ as a single fraction

$=> \frac{2\times 22}{7}\times 7.2$

Multiply $2$ and $22$ to get $44$,

$=> \frac{44}{7}\times 7.2$

Expressing $(\frac{44}{7}\times 49)$ as a single fraction

$=> \frac{44\times 7.2}{7}$

Multiply $44$ and $7.2$ to get $316.8$,

$=> \frac{316.8}{7}$

Divide $316.8$ by $7$ to get $45.25$,

$=>45.25cm$  

Hence circumference of the circle is $45.25$ cm.