Question

If 30 men and 14 boys can reap a field in 21 days ,in how many days will 20 men and 4 boys reap it

Answer 1

3 men = 5 boys

M/B = 5/3

Total work = (30 M + 14B) * 21

(30*5 + 14*3) *21

= 4032

Now: 4032/20*5+4*3= 36 days.