At what rate of compound interest rate per annual will a sum of Tk. 1200 become Tk. 1348.32 in 2 years?

At what rate of compound interest rate per annual will a sum of Tk. 1200 become Tk. 1348.32 in 2 years? Correct Answer 6%

Hints: ধরি, rate হচ্ছে R% per annual তাহলে, 1200 × {1 + (R/100)}2 = 1348.32 {1 + (R/100)}2 = 134832/120000 = 11236/10000 = (106/100)2 1 + (R/100) = 106/100 R = 6%
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