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2014-11-01T12:37:52+05:30

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For simple interest:
t = 2years
r = 10%
I = 200
Let principal = P

we know I =  \frac{Ptr}{100}  

P= \frac{100*I}{t*r} = \frac{100*200}{2*10} =1000

Compound interest:
r = 10%
t = 2years
P = 1000
n = 1

A=P(1+ \frac{r}{n} ) ^{nt} =1000(1+0.1) ^{2} = 1000*1.21=1210

Compound Interest = A - P = 1210 - 1000 = Rs. 210
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