If 8 men or 12 women can do a piece of work in 20 days, in how many days can the same work be done by 6 men and 11 women?
Select:  A) 10 days  B) 11 days  C) 12 days  D) 15 days  E) 17 days
8men = 12women (i.e 2men = 3women)   12women 1 day work= 1/20   soln:   6men(9women)+ 11women=20women=?   1 women 1 day work =12*20= 1/240   so, 20 women work= 20/240=1/12   ans: 12days   ANSWER:12 days
<result>C</result>
If 8 men or 12 women can do a piece of work in 20 days, in how many days can the same work be done by 6 men and 11 women?