A nucleoside on hydrolysis gives :
There are two types of fertilizers F1 and F2. F1 consists of 10 % nitrogen and 6 % phosphoric acid and F2 consists of 5 % nitrogen and 10 % of phosphoric acid. After testing the soil conditions, a farmer finds that she needs atleast 14 kg of nitrogen and 14 kg of phosphoric acid for her crop. If F1 costs Rs. 6 kg and F2 costs Rs. 5 kg, determine how much of each at a minimum cost. What is the minimum cost ?