• # question_answer The value of a machine depreciates every year by 10%. If the present value of the machine is Rs. 100000, what will be its value after three years. A)  20250                         B)  72900C)  90000            D)  81000

Correct Answer: B

Solution :

(b) The value of the machine after depreciation of 10% per year for 3 years = $Rs.\,\,100000\times \frac{90}{100}\times \frac{90}{100}\times \frac{90}{100}=72900/-$ Tip: $9\times 9\times 9$may be remembered as 729 It may also be remembered as, ${{3}^{2}}\times {{3}^{2}}\times {{3}^{2}}={{3}^{6}}$ which is 729 (by doing so, you are also revising your concepts learnt in chapter - 6).

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