B and c can together complete a piece of work in 4 days. If b stone can complete the same work in 12days. In how many days can c alone complete that work?
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B and C together work = 4 days
B -------------- = 12 days
C ------------- = 4x12
= 28 days
B -------------- = 12 days
C ------------- = 4x12
= 28 days
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