Earth circumference is 2*Pi*r is about 40,030 km. Now is up to you to decide the amount of running per day. If you run a marathon 42.2 km per day, you'll be done in around 2.5 years.
Earth circumference is 2*Pi*r is about 40,030 km. Now is up to you to decide the amount of running per day. If you run a marathon 42.2 km per day, you'll be done in around 2.5 years.
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