Mathematics, 14.07.2019 01:00 lovely90

An experienced bricklayer can construct a small wall in 4 hours. an apprentice can complete the job in 12 hours. find how long it takes if they work together. it would take _ hours for an experienced bricklayer and apprentice to construct a small wall together. (type an integer or a decimal.)

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An experienced bricklayer can construct a small wall in 4 hours. an apprentice can complete the job...