A man, a woman and a boy can together complete a piece of work in 3 days. If a man alone can do It in 8 davs and a boy alone in 18 days, how long will a woman alone take to complete the work?

A man, a woman and a boy can together complete a piece of work in 3 days. If a man alone can do It in 8 davs and a boy alone in 18 days, how long will a woman alone take to complete the work?
1). 9 days
2). 21 days
3). 24 days
4). 27 days

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