If 8 men or 12 women can do a piece of work in 40 days, in how many days can the same work be done by 6 men and 11 women? Choices
A) 10 days B) 11 days C) 13 days D) 15 days E) 24 days

Rationale: "8 men = 12 women ( i . e 2 men = 3 women ) 12 women 1 day work = 1 / 40 soln : 6 men ( 9 women ) + 11 women = 20 women = ? 1 women 1 day work = 12 * 40 = 1 / 480 so , 20 women work = 20 / 480 = 1 / 24 ans : 24 days answer : e"
Answer: E