A certain sum of money at compound interest grows up to ₹ $12960$ in $2$ years and up to ₹ $13176$ in $3$ years. Find the rate per cent per annum.
$1 \frac{1}{3}$
$2 \frac{1}{3}$
$1 \frac{2}{3}$
None of these
What will be the compound interest (In ₹) on a sum of ₹ $1875$ after $2$ years if the rate of interest for the first year is $4 \%$ and that for the second year is $8 \% ?$
If $Rs. 1200$ amounts to $Rs. 1323$ in $2$ years at compound interest compounded annually, what will $Rs. 1600$ amount (In $Rs.$) to in $3$ years at the same rate?
In what time (In $years$) will ₹ $8,000,$ at $3 \%$ annum, produce the same interest as ₹ $6,000$ does in $5$ years at $4 \%$ simple interest?
If a sum of money placed at compound interest, compounded annually, doubles itself in $5$ years, then the same amount of money will be $8$ times of itself in (In $years$)
A man borrows ₹ $25000$ at $20 \%$ compound interest. At the end of every year he pays ₹ $5000$ as part repayment. How much (In ₹) does he still owe after three such instalments?