Man is 40% more efficient than Woman. How much time will they, working together, take to complete a job which 1 Man alone could have done in 20 days? Choose the correct answer:	A) 11 days	B) 25 days	C) 22 days	D) 11 2â„3 days	E) 11 1â„3 days
Ratio of times taken by Man and Woman = 100 : 140 = 5 : 7.   Suppose Woman takes x days to do the work.   Then, 5 : 7 : : 20 : x â‡’ x = (20Ã—7)/5 â‡’ x = 28   Manâ€™s 1 dayâ€™s work = 1â„20; Womanâ€™s 1 days work = 1â„28   (Man + Woman)â€™s 1 dayâ€™s work = (1â„20 + 1â„28) = 3â„35   âˆ´ Man and Woman together can complete the job in 35â„3 days or 11 2â„3 days.   Answer 11 2â„3 days
<result>D</result>
Man is 40% more efficient than Woman. How much time will they, working together, take to complete a job which 1 Man alone could have done in 20 days?