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Arman wanted to have Tk. 39,200 , as interest after 5 years . He has invested an amount in an account for 1 year at 8% interest rate. From the 2nd year he invested the principal amount in another account in another account at the rate of 11% . what was the principle amount ?

Arman wanted to have Tk. 39,200 , as interest after 5 years . He has invested an amount in an account for 1 year at 8% interest rate. From the 2nd year he invested the principal amount in another account in another account at the rate of 11% . what was the principle amount ? Correct Answer Tk. 80,000

ধরি, principal amouut x তাহলে, x × 8100×1 + x×10100x3 + x×11100×1 = 39200 so x = 39200.08 + .10×3 + .11 = 80000

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