Asked by Bhargavi
If a certain sum doubles itself after 3 yrs kept at simple interest. In how many yrs will it become 5 times of its value?
Answers
Answered by
Steve
(1+r)^3 = 2
2^log_2(5) = 5, so
(1+r)^(3*log_2(5)) = 5
3*log_2(5) = 3 * log5/log2 = 6.97 years
Makes sense, since
3 years = 2x
6 years = 4x
so, 6.97 years = 5x
2^log_2(5) = 5, so
(1+r)^(3*log_2(5)) = 5
3*log_2(5) = 3 * log5/log2 = 6.97 years
Makes sense, since
3 years = 2x
6 years = 4x
so, 6.97 years = 5x
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