Sudershan deposited Rs 32000 in a bank, where the interest is credited quarterly. If the rate of interest be 5% per annum, what amount will he receive after 6 months?
Let the principal amount be $P=$ Rs 32000 .
Annual rate of interest, $R=5 \%$
Rate of interest for a quarter year $=\frac{5}{4} \%$
Time, $n=6$ months $=2$ quarter years
Then the amount with the compound interest is given by
$A=$ Rs. $P \times\left(1+\frac{R}{100}\right)^{n}$
$=$ Rs. $32000 \times\left(1+\frac{5}{100 \times 4}\right)^{2}$
$=$ Rs. $32000 \times\left(\frac{400+5}{400}\right)^{2}$
$=$ Rs. $32000 \times\left(\frac{405}{400}\right)^{2}$
$=$ Rs. $32000 \times\left(\frac{81}{80}\right)^{2}$
$=$ Rs. $32000 \times\left(\frac{81}{80}\right) \times\left(\frac{81}{80}\right)$
$=$ Rs. $(5 \times 81 \times 81)$
$=$ Rs. 32805
Therefore, Sudershan will receive an amount of Rs. 32805 after 6 months.