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We know the formula is  \frac{pnr}{100} .


Therefore the Simple Interest is 900 and the Amonut is 6000+900=6900.
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sorry yar but this answer is wrong
ok..... i will edit it..
S.I for the first year=p*r*t/100
Amount at the end of first year=SI+principal
S.I for the second year=p*r*t/100
Amount at the end of second year=SI +principal
SI for the third year=p*r*t/100
Final amount =SI+principal
Compound Interest=(Final Amount-First principal)
amount changes every year.
take amt of first year as the principal for second year
amt of second year as principal for yhird year
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