• # question_answer 39) 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

(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).