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 depends on the crop. It might be as little as a few weeks or as long as several years.
24 hours (a day)
THere is no limit. You can take it as long as you like, and as long as no new health concerns crop up that might make it a bad choice.
Assuming the 15 feet is the diameter of the circle. Formula to find the circumference of the circle is pi x diameter. 15 × 3.14 = 47.1 feet So the rope will be 47.1 feet long.
hii
It would take about a month.
90 minutes
Harvesting means to take the crop after it is grown and use it for yourself or to sell. To take in a crop, or gather a crop, is to harvest it.
It takes Pluto's moon 6.39 days to circle Pluto.
20 seconds
about 30 miinutes
Take the full circle and fold it in half by taking one edge and bringing it to the other side of the circle.