A, b and c together can complete a piece of work in 10 days. All the three started working at it together and after 4 days a left. Then b and c together completed the work in 10 more days. A alone could complete the work in: option 1 : 15 days option 2 : 16 days option 3 : 25 days option 4 : 50 days
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a alone can complete the work in1:15 days
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