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John does a job in 10 daysjack does a job in 5 dayshow long would it take both boys working together to complete the job?
Wiki User
∙ 14y ago
John does (1/10) = 0.1 of the job each day. Jack does (1/5) = 0.2 of the job each day.
Working together, they do (0.1 + 0.2) = 0.3 of the job each day.
(1 job) / (0.3 job per day) = (3 and 1/3) days
Wiki User
∙ 14y ago
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