Answer:
The length of the arc is 73.30 cm.
Step-by-step explanation:
Given : The circumference of a circle is
To find : What is the length of an arc of 140 degrees.
Solution :
Circumference is 


The radius of the circle is 30 cm.
Angle of arc is 
The angle is in radian so first we convert into radian as 
So, 
The formula of arc length is 
Where, l is the length of the arc , r is the radius of circle ,
is the angle in radian.
Substitute the value in the formula,


Therefore, The length of the arc is 73.30 cm.