The national wealth of a country increases by 4% of it's value at the beginning of every year .Find the national wealth of the country in 1985, if it was estimated as Rs 3.125 x 10^12 in 1983.

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Solution:

⇨Given
⇨p=3.125 X 10^12
⇨r=4%
⇨n=2 years
⇨The national wealth of the country in 1984

$\large A=p\left ( 1+\frac{r}{100} \right )^{n}$