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CEMC Gauss (Grade 8), 2005

Geometry Difficulty 1.0 Junior Find the answer Canada

A wheel with radius $1$ m is rolled in a straight line through one complete revolution on a flat horizontal surface. How many metres did the centre of the wheel travel horizontally from its starting location?

(A) $4\pi$ (B) $2$ (C) $2\pi$ (D) $\pi$ (E) $1$

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