Chemical Engineering Plant Economics
According to six-tenths-factor rule, if the cost of a given unit at one capacity is known, then the cost of similar unit with '' times the capacity of the first unit is approximately equal to __________ times the cost of the initial unit.

N
N0.6
√n
N0.4

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Chemical Engineering Plant Economics
Payback period

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

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