Question

12 cows can graze a field for 10 days. In how many days will 20 cows graze the same field. Sum in inverse method

Answer 1

12 cows can graze a field = 10 days
1 cow can graze a field = 12× 10 = 120 days
20 cows can graze a field = 120/ 20 = 6 days