Mathematics · Compound Interest
A certain sum of money amounts to 3 times of itself in 13 years when interest is compounded annually at a certain rate of interest per annum. In how many years will the initial sum amount to 9 times of itself at the same rate of interest per annum, also compounded annually?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 126 years✓
- 230 years
- 320 years
- 432 years
Correct answer
26 years
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