A and B together can complete a piece of work in 4days. If A alone can complete the same work in 12days, in how many days, in how many days can B alone complete that work?
Answers:	A) 6	B) 8	C) 10	D) 12	E) 5
(A+B)'s 1day's work = 1/4   A's 1day's work = 1/12   B's 1days's work = (1/4)-(1/12) = 1/6   Hence, B alone can complete the work in 6days.   6nswer is 6
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A and B together can complete a piece of work in 4days. If A alone can complete the same work in 12days, in how many days, in how many days can B alone complete that work?