1/10 because you will do it 10 times

Hope you could get an idea from here.
Doubt clarification - use comment section.
25.2 / 7.8 = ~ 3.23 hope that helps
The circumference of this circle is c=94.25ft
Step-by-step explanation:
perimeter=4×6-1/4 ×2π×3=24-1/2×3.14×3=24-4.71=19.29cm