Arithmetichard · Past Paper
The value of a machine depreciates 10% annually. If its current value is Rs. 81000, what was its value 2 years ago?
ARs. 100000
BRs. 90000
CRs. 110000
DRs. 95000
✓ Correct Answer: A — Rs. 100000
V = P(1-r/100)^n. 81000 = P(0.9)^2 => 81000 = 0.81P => P = 100000.
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