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Mathematics, 14.07.2019 06:00 pinapunapula

Acompany found that an experienced surveyor can survey a roadbed in 7 hours. an apprentice surveyor needs 9 hours to survey the same stretch of road. if the two work together, find how long it takes them to complete the job.

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Acompany found that an experienced surveyor can survey a roadbed in 7 hours. an apprentice surveyor...
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