Every year, the value of a surveying machine depreciates by 25% of its value in the previous year. If the value of the machine was $11250 in 2012, find its value in 2010.
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A machine depreciates in value each year at the rate of 10% of its previous value. However, every second year there is some maintenance work so that in that particular year, depreciation is only 5% of its previous value. If at the end of the fourth year, the value of the machine stands at Rs. 1,46,205, then find the value of the machine at the start at the first year?
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