find the compound interest on Rs 1000 at the rate of 20% per annum for 18 month when interest is compounded half yearly.
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I think the answer is 500
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A=p(1+r/100)^n for one year
=1000(1+20/100)^1
=1000(121/100)^1
A=1210
for 6 month A=A/2=605
for 18 months A=1210+605
A=1815
compound interest equal to I=A-P
1815-1000
that is I=815
=1000(1+20/100)^1
=1000(121/100)^1
A=1210
for 6 month A=A/2=605
for 18 months A=1210+605
A=1815
compound interest equal to I=A-P
1815-1000
that is I=815
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