Question

If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same work will be: 

(a) 4 days (b) 5 days (c) 6 days (d) 7 days (e) None of these

Answer 1

(a) Let 1 man’s 1 day’s work = x and
1 boy’s 1 day’s work = y.

15 men and 20 boys can do the work in 4 days.