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A and B together can do a work in 8 days. If A alone can do it in 12 days, then in how many days can B alone do it?

Correct Answer: 24 days

Explanation:

Required time taken by B to complete the work = xy / x - y
[Here x = 12 and y = 8]
⇒ required time = (12 x 8) / (12 - 8) = 96/4 = 24 days


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