A con do a piece of work in 60 days, He works for 15 days and then B alone finishes the remaining work in 30 days. The tow together can finish the work in

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A con do a piece of work in 60 days, He works for 15 days and then B alone finishes the remaining work in 30 days. The tow together can finish the work in

25 days

30 days

32 days

24 days