Mathematics, 03.04.2020 02:25 moore7165

John can complete a job in 2 hours and Brenda takes 3 hours. John works alone for 30 minutes and is then joined by Brenda. How long will it take them to finish the job together?

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John can complete a job in 2 hours and Brenda takes 3 hours. John works alone for 30 minutes and is...