A company owns two coal mines, A and B s...

A company owns two coal mines, A and B say. The production in these mines and the total requirement are given in the table below :

How many days should each mine be operated if it costs Rs. 500 per day to work each mine so that the total cost incurred is minimized when the requirements are satisfied ?

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The correct Answer is:

(35, 22.5) days

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