একটি মূলধন 5 বছরের সরল সুদ হয় তার মূলধনের  \(\frac{2}{5}\) গুণ, তাহলে সরল সুদের হার হবে- 

  1. 13%
  2. \(12\frac{1}{3}\% \)
  3. \(14\frac{1}{3}\% \)​​
  4. \(8\% \)

Answer (Detailed Solution Below)

Option 4 : \(8\% \)
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Detailed Solution

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ধরা যাক P = মূলধন, R = সুদের হার এবং N = সময় 

সরল সুদ = PNR/100

প্রদত্ত,

N = 5 বছর ​

তাহলে,

⇒ 2/5 × P = (P × R × 5)/100

⇒ R = 200/25

\(\therefore {\rm{\;}}R = 8 % \) %

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