A sum of money at simple interest amounts to Tk. 2800 in 2 years and to Tk. 3250 in 5 years at a rate of :

A sum of money at simple interest amounts to Tk. 2800 in 2 years and to Tk. 3250 in 5 years at a rate of : Correct Answer 6%

আসল + ৫ বছরের মুনাফা = ৩২৫০ আসল + ২ বছরের মুনাফা = ২৮০০ [ বিয়োগ করে ] ৩ বছরের মুনাফা = ৪৫০ ২ বছরের মুনাফা = ( ৪৫০ × ২) /৩ = ৩০০ আসল = ২৮০০ - ৩০০ = ২৫০০ টাকা মুনাফার হার = ( ৩০০ × ১০০) /(২৫০০ × ২)% = ৬%
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