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Question
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--
13%
14%
16%
18%
ANSWER : 3
Descrption
<pre>"Let, interest rate = x% So, number of year x 100 Tk. 1 years = x Tk. Interest <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>∴</mo></math> 100 Tk. X years interedt = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfenced><mrow><mi>x</mi><mo> × </mo><mi>x</mi></mrow></mfenced><mo> = </mo><msup><mi>x</mi><mn>2</mn></msup></math>Tk. According to the question,<math xmlns = "http://www.w3.org/1998/Math/MathML"><msup><mi>x</mi><mn>2</mn></msup><mo> = </mo><mn>256</mn><mspace linebreak = "newline"/><mo>∴</mo><mi>x</mi><mo> = </mo><mn>16</mn></math> </pre>
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