UKMT Grey Kangaroo, 2015

Algebra Difficulty 1.0 Junior Find the answer United Kingdom

A cyclist rides at $5$ metres per second. The wheels of his bicycle have a circumference of $125$ cm. How many complete turns does each wheel make in $5$ seconds?

(A) $4$ (B) $5$ (C) $10$ (D) $20$ (E) $25$

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