Question

If ₹8000 becomes ₹9261 at 5% per annum compounded annually, then find the time
period.

Answer 1

Amount=Rs.9261

Rate=5%

Principal=Rs.8000

CI=Rs.9261

Now, CI=P(1+

100

R

)

n

8000

9261

=(

100

105

)

n

(

20

21

)=(

20

21

)

n

∴n=3years

please mark me as a brain list..

Answer 2

Answer:-

$A = P(1 + \frac{R}{100} )$

$= > 9261 = 8000{(1 + \frac{5}{100} ) }^{n}$

$= > \frac{9261}{8000} = {(1 + \frac{1}{20} })^{n}$

$= > \frac{ {21}^{3} }{ {20}^{3} } = ( { \frac{21}{20} })^{n}$

$= > ( { \frac{21}{20} })^{3} = ({ \frac{21}{20} })^{n}$

$n = 3$

$Time = 3 years$

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