Question

Find Rate of interest if CI- SI= 324, T= 2yrs and P=10000

Answer 1

Step-by-step explanation:

given

ci-si=324

time=2years

principal=10000

According to formula

$ci - \: si = p( \frac{r}{10} ) {}^{2} \\ = > 324 = 10000( \frac{r}{100} ) {}^{2} \\ = > \frac{324}{10000} =( \frac{r}{100}) {}^{2} \\ = > ( \frac{18}{100} ) {}^{2} = ( \frac{r}{100} ) {}^{2} \\ = > \frac{18}{100} = \frac{r}{100} \\ = > 100r = 1800 = > r = 18\%$

hence their rate will be 18%

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