find the amount and the compound interest on rupees 8000 for 1 year at 10 % per annum compounded half yearly.
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half yearly
r= 10/2=5%half yearly
t= 1year=12 months/6=2time
a=p(1-r/100)t
a=8000(1+5/100)^2
a=8000(105/100)^2
a=8000(21/20)^2
a=8000×21/20×21/20
a=20×21×21
a=8820
ci=a-p
ci=8820-8000
ci=820rs
r= 10/2=5%half yearly
t= 1year=12 months/6=2time
a=p(1-r/100)t
a=8000(1+5/100)^2
a=8000(105/100)^2
a=8000(21/20)^2
a=8000×21/20×21/20
a=20×21×21
a=8820
ci=a-p
ci=8820-8000
ci=820rs
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