Chemical Engineering Plant Economics
Operating profit of a chemical plant is equal to

Profit after tax plus depreciation
Net profit + tax
Profit before interest and tax i.e., net profit + interest + tax
Profit after tax

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Chemical Engineering Plant Economics
Payback period

Is the length of time over which the earnings on a project equals the investment
All of these
Is affected by the variation in earnings after the recovery of the investment
And economic life of a project are the same

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