If 3 men or 9 boys can finish a work in 21 days, then in how many days can 5 men and 6 boys finish the same work?
Question
If 3 men or 9 boys can finish a work in 21 days, then in how many days can 5 men and 6 boys finish the same work?
If 3 men or 9 boys can finish a work in 21 days, then in how many days can 5 men and 6 boys finish the same work?