A dealer wishes to purchase a number of fans and radio. He has only $\$5760$ to invest and has a space for atmost 20 items. A fan costs him $\$360$ and a radio $\$240$. His expectation is this he can sell a fan at a profit of $\$22$ and a radio at a profit of $\$18$ . Assuming that he can sell all the items that he buys, how should be invert his money for maximum profit? Translate the problem as LPP and solve it graphically . What is the importance of electricity in our life .

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