2 men and 7 boys can do a piece of work in 14 days,

3 men and 8 boys can do it in 11 days.

8 men and 6 boys can do this 3 times of work in how many days?

Logic: I found either the first or the second sentence is redundant, but when I ignored one and tried solving, it gives me wrong answers, Kindly help how to approach?