Answer:
28.278inch
Step-by-step explanation:
Circumstances of a circle can ba found with these experiension
C= 2πr
Where r= radius
Given diameter= 9 inch
Radius= diameter/2= 9/2= 4.5 inch
Input the values, we have
C= 2×π ×4.5
= 28.278inch
Hence, the circumstances is 28.278inch