Question

12 The difference between the CI and the S.I. on 8.400 for two years is 21 at the
same rate of interest per year. Find the rate of interest.​

Answer 1

Answer:

5%

Step-by-step explanation:

D = P

$( { \frac{r}{100} )}^{2}$

$21 = 8400( { \frac{r}{100} })^{2}$

$1 = 4 { \frac{r}{100} }^{2}$

${r}^{2} = 25$

$r = 5\%$

Answer 2

Answer:

answer is 5%

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