The cost function of a product is 400 + 2x, where x is the number of units produced . How many units should be produced to make an average cost of TK. 2.5 per unit ?

The cost function of a product is 400 + 2x, where x is the number of units produced . How many units should be produced to make an average cost of TK. 2.5 per unit ? Correct Answer 800

400 + 2x = 2.5xOr, 400 = 0.5xOr, x = 800
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