If simple interest on a certain sum of money is Tk. 256 and the rate of interest per annum equals the number of years,then the rate of interest is--

If simple interest on a certain sum of money is Tk. 256 and the rate of interest per annum equals the number of years,then the rate of interest is-- Correct Answer 16%

"Let, interest rate = x% So, number of year x 100 Tk. 1 years = x Tk. Interest ∴ 100 Tk. X years interedt = x × x = x2Tk. According to the question,x2 = 256∴x = 16
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