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### Gauthmathier9436

Grade 9 · 2021-08-04

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l. Worker A can finish a job in 5 hours. When worker
A works together with worker B, they can finish
the job in 4 hours. How long does it take for worker
Réto finish the job if he works alone?

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### Gauthmathier6977

Grade 9 · 2021-08-04

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