1. The amount doubles itself under Compound interest in 7 years. In how many years will it become 64 times of it? (in years)
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By: anil on 05 May 2019 01.13 am
The amount gets doubled in 7 years. In case of compound interest, the amount will become $$2^n$$ times in $$7n$$ years => Final amount = $$64=(2)^6$$ Thus, after $$7 imes6=42$$ years, amount will become 64 times. => Ans - (A)
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