Days required by 4 goats to graze the field = Days required by 6 sheep to graze the field Therefore, Efficiency of 4 goats = Efficiency of 6 sheep ⇒ 2 goats = 3 sheep Number of days taken by 4 goats tograze the field = 50 days Therefore, number of days taken by2 goats and 3 sheep to graze the field = 50 days