Question

at what percentage of annual interest does rupees 4000 become rupees 5290 in 2 years if interest bill calculator annually

Answer 1

interest is 5290-4000=1290
so
1290×100/4000×2
129000/8000=16.125%

Answer 2

Answer:

15% is the answer.

Step-by-step explanation:

According to the question :-

• A= 5290 Rupees
• P = 4000 Rupees
• T = 2 Year
• R = ?

$\sf{= > a = p { (1 + \frac{r}{100} ) }^{2}}$

$\therefore \: 5290 = 4000( {1 + \frac{r}{100})}^{2}$

$= > \frac{5290}{4000} = {(1 + \frac{r}{100} )}^{2}$

$= > \sqrt{ \frac{5290}{400} } = 1 + \frac{r}{100}$

$= > \sqrt{ { \frac{23}{20} }^{2} } = 1 + \frac{r}{100}$

$= > \frac{23}{20} = 1 + \frac{r}{100}$

$= > \frac{23}{20} - 1 = \frac{r}{100 }$

$= > \frac{23 - 20}{20} = \frac{r}{100}$

$= > \frac{3}{20} = \frac{r}{100}$

$= > r = \frac{3}{20} \times 100 = 15\%$

${ \color{red}{ \underline{ \bf{50 \: is \: the \: answer }}}}$