Question

Rs.800 at 5% per annum compound interest will amount to rs.882 in

Answer 1

In About 20 to 25 days he will have to pay that

Answer 2

Answer:

Here, amount A = Rs 882, principal P =Rs 800 and rate R = 5% per annum.

$∴\large\ \mathtt \pink{A = P ( 1 + \frac{R}{100})^{n} }$

$⇛882 = 800(1 + \ \frac{5}{100} ) ^{n}$

$⇛ \frac{882}{800} = (1 + \frac{1}{20} )^{n}$

$⇛ \frac{882}{800 } = ( \frac{21}{20} )^{n}$

$⇛ \frac{441}{400} = ( \frac{21}{20})^{2}⇛( \frac{21}{20} ) ^{n} = ( \frac{21}{20} ) ^{2}$

$\large\ \mathtt \green{⇛n \: = 2}$

Hence, required time is 2 years.