Q23. A farmer has a supply of chemical fertiliser of type A which contains 10% nitrogen and 6% phosphoric acid and of type B which contains 5% nitrogen and 10% phosphoric acid. After soil test, it is found that atleast 7 kg of nitrogen and same quantity of phosphoric acid is required for a good crop. The fertiliser of type A costs Rs 5 per kg and the type B cost Rs 8 per kg. Using linear programming, find how many kilograms of each type of the fertiliser should be bought to meet the requirement and for the cost to be minimum. Find the feasible region in the graph.
