Question

I'f the simple interest for 6 years is equal to 30% of the principal it will be equal to the principal after​

Answer 1

Solution :-

$30\% \: of \: principle = simple \: interest \: for \: 6 \: years \: \\ \frac{30}{100} \times p = \frac{p \times r \times n}{100} \\ \frac{30}{100} \times p = \frac{p \times r \times 6}{100} \\ \frac{30 \: p}{100} = \frac{p \times r \times 6}{100} \\ after \: cancel \: the \: same \: term \: \\ 30 = r \times 6 \\ r = 5$

After 20 years simple intresr will be equal to principal