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Mathematics 17 Online
OpenStudy (anonymous):

Andrew, Ching, and Jerry are running in track practice. Andrew can run 3 laps in 4 minutes, Ching can run 2 laps in 7 minutes, and Jerry can run 3 laps in 6 minutes. How long would it take them to run one lap, if each ran one-third of a lap at his given rate? Please explain.

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