Mathematics, 22.03.2021 18:00, brinjay430

10 workers can finish the job in 15days. For the first 5 days, only 6 workers worked on the job. Then for the next 3 days 2 more workers joined them. To finish the job, 4 more workers joined them. After how many days was the whole job done?

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10 workers can finish the job in 15days. For the first 5 days, only 6 workers worked on the job. The...