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CEMC Gauss (Grade 7), 2006

Algebra Difficulty 2.0 Junior Find the answer Canada

Keiko and Leah run on a track that is 150 m around. It takes Keiko 120 seconds to run 3 times around the track, and it takes Leah 160 seconds to run 5 times around the track. Who is the faster runner and at approximately what speed does she run?

(A) Keiko, 3.75 m/s3.75 \text{ m/s} (B) Keiko, 2.4 m/s2.4 \text{ m/s} (C) Leah, 3.3 m/s3.3 \text{ m/s} (D) Leah, 4.69 m/s4.69 \text{ m/s} (E) Leah, 3.75 m/s3.75 \text{ m/s}

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