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A sum of money triples itself in 3 years at compound interest. In how many years will it become 9 times itself ?A. 4B. 9C. 6D. 7 |
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Answer» Correct Answer - C (i) Use formula for amount and then use laws of indices, (ii) Let `3P=P(1+(R )/(100))^(3)` find R. (iii) Let `9P=P(1+(R )/(100))^(n)`, find n. |
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