How long does it take to walk around the 6 km playground?

It takes 1 to 2 hours. Adults take two steps per second on average, about 1 meter. An hour is about 3 kilometers, and six kilometers is about 2 hours. If you leave in a hurry, less than 2 hours, 1 hour. So it depends on the speed of walking. Six kilometers takes one to two hours. 6 kilometers is 12 mile, which is 6000 meters.