The compound interest earned by Shivam on a certain amount at the end of $2$ years at the rate of $8 \,p.c.p.a.$ was $Rs. 1414.4 .$ What was the total amount that Shivam got back at the end of $2$ years in the form of principal plus interest earned (In $Rs.$) ?

The difference between simple and compound interest compounded annually on a certain sum of money for $2$ years at $4 \%$ per annum is ₹ $8$. The sum is (In ₹)

The difference between simple interest and compound interest compounded annually on a certain sum of money for $2$ years at $4 \%$ per annum is ₹ $1 .$ The sum (in ₹) is

The sample interest on a sum of money for $3$ years is ₹ $240$ and the compound interest on the same sum, at the same rate for $2$ years is ₹ $170 .$ The rate of interest is (In $\%$)

The principal that amounts to ₹ $4913$ in $3$ years at $6 \frac{1}{4} \%$ per annum compound interest compounded annually (In ₹) is.

A sum of ₹ $15000$ deposited at compound interest becomes double after $5$ $years.$ After $20$ $years$, it will become (In ₹)