Question

Calculate the compound interest on rs.4000 in $1 \frac{1}{2}$years at 10% per annum compounded half yearly.
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Answer 1

°•●Solution●•°

$\sf \: A=P (1 + \frac{r}{2 \times 100} {)}^{n \times 2} \\ \\ \rightarrow \sf \: A = 4000 {\huge{(}}1 + \frac{10}{2 \times 100} { \huge{)}}^{ \frac{3}{2} \times 2} = 4630.50$

C.I.=A-P

=4630.50-4000=rs.630.50

Hope it helps you....