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বার্ষিক 12.5% সরল সুদে কত বছরের সুদ আসলের সমান হবে?

Options :

  • (A) 4 বছরে
  • (B) 8 বছরে
  • (C) 7 বছরে
  • (D) 5 বছরে

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মনে করি, আসল/মূলধন $100$ টাকা

তাহলে, প্রশ্নমতে, সুদাসল = আসলের ২গুণ = $100 \times 2$ $=200$ টাকা

সুতরাং, সুদ = সুদাসল - আসল = $200-100$ $=100$ টাকা

এখানে, সুদ $(I)=100$ টাকা, মূলধন $(P)=100$ টাকা, সময় $(n)=?$ বছর, সুদের হার $(r)=12.5\%$

আমরা জানি, $n=\frac{I}{Pr} \times 100$

বা, $n=\frac{100}{100 \times 12.5} \times 100$

বা, $n=\frac{100 \times 10}{100 \times 125} \times 100$

বা, $n=\frac{\bcancel{100}\times{\displaystyle\overset2{\bcancel{10}}}}{\bcancel{100}\times{\displaystyle\underset{\bcancel5}{\cancel{125}}}}\times\overset4{\cancel{100}}$

$\therefore n=8$

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