A) 20250
B) 72900
C) 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 are also revising your concepts learnt in previous chapter).
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