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There are two types of fertilizers F1" a...

There are two types of fertilizers `F_1" and "F_2` consists of 10% nitrogen and 6% phosphoric acid and `F_2` consists of 5% nitrogen and 10% phosphoric acid. After testing the soil conditions, a farmer finds that he needs atleast 14 kg of nitrogen and 14 kg of phosphoric acid for his crop. If `F_1` costs Rs. 6/kg and `F_2` costs Rs. 5 kg. Determine how much of each type fertilizer should be used so theat nutrient requirements are met at a minimum cost. What is the minimum cost? Also show graphically.

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