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 6 days and a boy alone in 12 days, how long will a woman take to complete the work? Choose the correct choice:
A) 12days B) 10days C) 9days D) 8days E) 11days
Explanation:   (1 Man + 1 woman + 1 boy)’s 1day’s work = 1/3   1 man’s 1 day work = 1/6   1boy’s 1 day’s work = 1/1   (1 Man + 1 boy) ‘s 1 day’s work = 1/6 + 1/12 = 1/4   Therefore, 1 woman’s 1 day’s work = 1/3 – 1/4 = 1/12   Therefore, the woman alone can finish the work in 12days.   12daysnswer: Option 12days
<result>A</result>
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 6 days and a boy alone in 12 days, how long will a woman take to complete the work?