The answer is 10 as the diameter because it says to estimate pi as 3. Since we know the circumference is 30 we can reverse it to find the diameter, since Circumference is pi time diameter.
Answer:
d = 10 km
Step-by-step explanation:
Circumference is equal to pi times diameter
C = pi *d
We know the circumference is 30
30 = pi *d
Let pi = 3
30 = 3d
Divide each side by 3
30/3=3d/3
10 =d
The diameter is 30 km
