A and b together can complete a job in 8 days. Both b and c, working alone can finish the same job in 12 days. A and b commence work on the job, and work for 4 days. Whereupon a leaves, b continues for 2 more days, and then he leaves too. C now starts working, and finishes the job. How many days did c require?
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28 days did c require
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