1 Meter High

You have a rope that will reach around the earth (+/- 40,000 km). If you put sticks of 1 meter high around the world and lay the rope on these sticks, how much longer will the rope need to be?


The rope has to be 6.28 meters longer (= 2 π).

It does not even matter how big the original circle is. If you extend the the radius by 1 meter, the circle will always gets 6.28 meters longer.

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