A and B can do a piece of work, in 12 days, B and C in 8 days and C and A in 6 days. How long would B take to do the same work alone ?

A and B can do a piece of work, in 12 days, B and C in 8 days and C and A in 6 days. How long would B take to do the same work alone ?
1). 24 days
2). 32 days
3). 40 days
4). 48 days

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