+1 vote
in Mass Transfer by (37.1k points)
Total cost is

(a) Operating + optimum cost

(b) Fixed + optimum cost

(c) Fixed + operating cost

(d) None of the mentioned

The question was posed to me during a job interview.

This intriguing question originated from Cost Variance with Reflux Ratio topic in portion Distillation of Mass Transfer

1 Answer

0 votes
by (39.8k points)
The correct option is (c) Fixed + operating cost

The best I can explain: The total cost is estimated by the sum of cost of trays and other devices like condenser, reboiler which equals the sum of operating and fixed cost.

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