Question

b) A certain amount was deposited into a bank account having an interest rate of 5%
if the total amount after 4 years was 21,500. how much was the amount deposited
initially? For the same initial amount, how should the interest rate increase such
that the simple interest would amount to 400?​

Answer 1

Answer:

4700 Is the answer of this Question

Answer 2

$i) Let \: the \: amount \: deposited = Rs \:P$

$Rate \:of \: interest (R) = 5\%$

$Time (T) = 4 \%$

$Amount (A) = Rs \: 21500$

$P\Big( 1 + \frac{TR}{100}\Big) = 21500$

$\implies P\Big( 1 + \frac{4\times 5}{100}\Big) = 21500$

$\implies P\Big( 1 + \frac{1}{5}\Big) = 21500$

$\implies P \times \frac{6}{5} = 21500$

$\implies P = 21500 \times \frac{5}{6}$

$\implies \green {P = Rs\:17916.66 }$

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