A sum of money placed at Compound interest becomes 27 times of itself in 15 years. In 25 years, it will becomes how many times?

Shortcut Sol: 3^3 = 3*5

?=5*5

? = 3^5 =

Actual CI formulae is \(\displaystyle CI = P(1+\large\frac{r}{100})\normalsize^{n}\)

But solution looks totally different. Please explain.

Shortcut Sol: 3^3 = 3*5

?=5*5

? = 3^5 =

**243 times**.Actual CI formulae is \(\displaystyle CI = P(1+\large\frac{r}{100})\normalsize^{n}\)

But solution looks totally different. Please explain.

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