প্রশ্ন ও সমাধান

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 $2^{\text {nd }}$ year, he invested the principal amount in another account offering $10 \%$ interest for 3 years. At the beginning of the fifth year he invested the principal amount in another account at the rate of $11 \%$ . What was the principal amount? (assume simple interest rate)