Question: process engineering and economics need step by step and proper hand written solution sir / maam 10 A furnace installation 'A' costs Rs.1.2 lakhs with
10 A furnace installation 'A' costs Rs.1.2 lakhs with operating cost at Rs.48,000 per annum. It has a life of 10 years. The installation 'B' guarantees same performance with an operating cost of Rs.38,000 with an initial cost of Rs.2.5 lakhs. Salvage value for both is Rs. 10,000. What increase in life would be required for plan 'B' to warrant its selection if money is worth 7%
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