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A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to 8 times?
9 years
8 years
27 years
12 years
12 years
Practice and solve "A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amou..." for Electrical - Economics for Engineers. The correct answer is Option D: 12 years. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Option **(d) **