Chemical Engineering Plant Economics
An annuity is a series of equal payments occuring at equal time intervals, and this amount includes the sum of all payments plus interest, if allowed to accumulate at a definite rate of interest from the time of initial payment to the end of annuity term. Ordinary annuity is used in the calculation of the

Manufacturing cost
Depreciation by sinking fund method
Discrete compound interest
Cash ratio

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Chemical Engineering Plant Economics
Pick out the correct statement.

Difference between income and expense is termed as gross revenue
Sum-of-the-years-digits methods of depreciation calculation accounts for the interest on the investment
Unamortised cost is the difference between the original cost of a property and all the depreciation charges made to dat
Scrap value is the net amount of money obtainable from the sale of used property over and above any charges involved in its removal & sale

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