Industrial Engineering and Production Management
Which of the following depreciation system ensures that the interest be charged on the cost of machine asset every year on the book value, but the rate of depreciation every year remains constant

Annuity charging method
Sinking fund method
Straight line method
ABC charging method

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Industrial Engineering and Production Management
The reasons which are basically responsible for the formation of a queue should be that

Output rate is constant and the input varies in a random manner
The average service rate Hess than the average arrival rate
All of these
Output rate is linearly proportional to input

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