The cost, in taka of manufacturing X units of products is (9,000+400x). The amount received when selling these X units of products is taka 500 X. What is the least number of products that must be manufactured and sold so that the amount received is at least equal to the manufacturing cost?
A 10
B 18
C 45
D 90
Solution
Correct Answer: Option D
9,000+400x = 500x
x = 90
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