Answer:
20π m or 62.83 m
Explanation:
The formula for Circumference is C = 2πr
All you need to find for the formula is the radius, which is half of the diameter.



Then plug the radius into the formula and solve for Circumference


or 
Znam tylko azjatycki standard urody, proszę opisać, co masz na myśli.
Subsequental, chronicle, anecdote, saga, legend.
Answer:
The biggest thing in the world is a Blue Whale
Explanation:
Hope this helps :)