One cookie take it with you as you fly around the world.
16cm
The circle is the soil in the world, and the square is a tree coming out of the soil.
Take the diameter of the circle times 3.14159 (which is PI).
A circle graph is a pie chart
It is impossible for any number of people to physically circle the entire world since the Earth is a sphere.
It would take about a month.
Depends on how elaborate the hoaxers want to make it. A simple crop circle may not take much time at all. Such vandalism of other people's property is not done by the better class of people, in this world or any other.
It takes Pluto's moon 6.39 days to circle Pluto.
about 30 miinutes
20 seconds
If there were a great-circle route consisting of all water ... there isn't ...then it would take 345days 20hours . (rounded)
About 523 Earth years.
365 days
One cookie take it with you as you fly around the world.
About an hour.
7 hours.