9cm
Explanation: we have found that the radius is 2.999239 and the formula for circumference of a circle is:
π
⋅
d
2.999239
⋅
2
=
5.99848
(multiply by 2 to get the diameter)
5.99848
⋅
π
=
18.84478
Answer:
9cm
Step-by-step explanation:
since diameter is twice of the radius of circle so you need radius to solve this.
as circumference is given here and the formula for calculating circumference of circle is c=2[tex]\pi[/tex]r so for radius it can be write as r=c/2[tex]\pi[/tex]. putting value of c and [tex]\pi[/tex] we get radius.
r=c/2[tex]\pi[/tex] = 28.26/2*3.147 = 4.5cm. now diameter is twice the radius i.e. 4.5*2=9cm.
