Question

Interest on Rs 12000 at 15% p.a for two years is ​

Answer 1

$\\ \sf \: amout \: = p(1 + \frac{r}{100} ) {}^{n}$

Principal - 12000

Rate - 15 % per annum

Time = 2 years

$\\ \sf \: amount = 12000(1 + \frac{15}{100} ) {}^{2}$

$\\ = 12000( \frac { \: \: 115}{ \: \: \: \: 100 \: \: \: } )$

$\\ = 12000 \times \frac{115}{100 } \times \frac{115}{100}$

$\\ \sf \: = ₹15870$

$\\ \sf \: compound \: intrest \: = a - p$

Where a is amount OR p is principal..

$\\ 15870 - 12000 \\ = ₹3870$

The Compound Interest = ₹3870