In a dairy farm, 40 cows eat 40 bags of husk in 40 days. In how many days will one cow eat one bag?

Given data

• 40 cows consume 40 bags in 40 days.

Concept / Approach

• Use the work-rate idea: consumption is proportional to (number of cows) × (days).

Step-by-step calculationLet r = bags consumed per cow per day.Total bags = (cows) × (days) × r ⇒ 40 = 40 × 40 × rr = 40 / 1600 = 1/40 bag per cow per dayTime for 1 cow to consume 1 bag = 1 ÷ (1/40) = 40 days

Final Answer40 days