Question
During summer, a local potter makes one refrigerator in 5
thousand rupees using clay and other materials. The
demand function of such a refrigerator is $p=21-x$,
where $p=$ price (in thousand rupees) and $x=$
demand of refrigerator. How many refrigerators should
the potter make to get maximum profit? Also obtain
the maximum profit.

Answer

Maximum profit $=64$ at $x=8$

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