| [ A ] 10 years |
|
| [ B ] 20 years | |
| [ C ] 4 years | |
| [ D ] 15 years |  |
A sum of money placed at compount interest doubles itseful in 5 years. In how many years, it would amount to eight times of itself at the same rate of interest ?
| Answer : Option D |
| Explanation : |
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