The cost, in taka, of manufacturing x microwaves is 6000+300x taka. The amount received when selling these x microwaves is 700x taka. What is the least number of microwaves that must be manufactured and sold so that net profit is Tk. 2,400?
A. 15
B. 21
C. 19
D. 17
সঠিক উত্তরঃ
B.
21
Explanation:
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