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 the net profit is Tk 2400 ?
A. 15
B. 17
C. 19
D. 21
E. 23
সঠিক উত্তরঃ
D.
21
Explanation:
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