A and B together can do a piece of work in 12 days, which B and C together can do in 16 days. After A has been working at it for 5 days and B for 7 days, C finishes it in 13 days. In how many days C alone will do the work?
13,000
18,000
28% off
5.0
5.0
13,000
5.0
5.0
4.5
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