CEMC Fermat, 1999

Algebra Difficulty 1.0 Junior Find the answer Canada

Turning a screwdriver $90^\circ$ will drive a screw 3 mm deeper into a piece of wood. How many complete revolutions are needed to drive the screw 36 mm into the wood?

(A) $3$ (B) $4$ (C) $6$ (D) $9$ (E) $12$

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