Library / /334 of 475

, 2008

Geometry Difficulty 2.0 Junior Find the answer Canada

A circle has an area of $M$ cm $^2$ and a circumference of $N$ cm. If $\dfrac{M}{N} = 20$ , what is the radius of the circle, in cm?

(A) $10$ (B) $20$ (C) $40$ (D) $\dfrac{1}{10}$ (E) $\dfrac{1}{20}$

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.