5 men can do a piece of work in 19 days. 1 man’s 1 day’s work = 1/(5 × 19) = 1/95 3 men’s 1 day’s work = 3/(5 × 19) = 3/95 9 women can do a piece of work in 19 days 1 woman’s 1 day’s work =1/(9 × 19) = 1/171 6 women’s 1 day’s work =6/(9 × 19) = 6/171 = 2/57 Number of days required by 3 men and 6 women to complete the work: =