A manufacturing company makes two types of teaching aids A and B of mathematics for class 12. Each type of A requires 9 labour hours for fabricating and 1 labour hour for finishing. Each type of B requires 12 labour hour for fabricating and 3 labour hours for finishing. For fabricating and finishing maximum labour hours available are 180 and 30 respectively. The company makes profit of Rs.80 on each piece of type A and Rs.120 on each piece of type B How many pieces of type A and B should be manufactured per week to get maximum profit. What is maximum profit per week? Solve graphically.
Is teaching aid necessary for teaching learning process? Justify your answer