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Ay what rate of compound interest per an...

Ay what rate of compound interest per annum Rs. 1000 will amount Rs. 13310 in 3 year?

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Let the rate be r% per annum
As per question `Rs. 10000(1+r/100)^(3)=Rs. 13310`
or `(1+r/100)^(3)=13310/10000=1331/1000` or `(1+r/100)^(3)=(11/10)^(3)`
`implies 1+r/100=11/10impliesr/100=11/10-1`
r/`100=1/10` or `r=10`
Hence the required rate `=10%`
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