రషీద్ సంవత్సరానికి 10% చొప్పున చక్రవడ్డీ లెక్కించేలా రూ.30,240 అప్పుగా తీసుకున్నాడు. ఆ మొత్తాన్ని రెండు సమాన వార్షిక వాయిదాలలో తిరిగి చెల్లించాలంటే, అతను చెల్లించిన వడ్డీ:

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AAI ATC Junior Executive 21 Feb 2023 Shift 2 Official Paper
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  1. రూ. 4,608 
  2. రూ. 4,590 
  3. రూ. 4,518 
  4. రూ. 4,600 

Answer (Detailed Solution Below)

Option 1 : రూ. 4,608 
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ఇచ్చినది:

అసలు = రూ. 30,240

రేటు = సంవత్సరానికి 10% చొప్పున చక్రవడ్డీ లెక్కించేలా

వాయిదాల సంఖ్య = 2

ఉపయోగించిన సూత్రం:

CI కోసం, సమాన వాయిదాల విషయంలో

అసలు = \(\frac{Installment}{(1+\frac{r}{100})}\)\(\frac{Installment}{(1+\frac{r}{100})^2}\)\(\frac{Installment}{(1+\frac{r}{100})^3}\) + ---- + \(\frac{Installment}{(1+\frac{r}{100})^n}\)

గణన:

వాయిదా Y అని ఉండనివ్వండి

అసలు \(\frac{Y}{(1+\frac{r}{100})}\)\(\frac{Y}{(1+\frac{r}{100})^2}\)

⇒ 30,240 = \(\frac{Y}{(1+\frac{10}{100})}\) + \(\frac{Y}{(1+\frac{10}{100})^2}\)

⇒ 30,240 = \(\frac{Y}{(\frac{11}{10})}\) + \(\frac{Y}{(\frac{11}{10})^2}\)

⇒  30,240 = Y × \(\frac{10}{11}\) + Y × \(\frac{100}{121}\)

⇒  30,240 = Y × \(\frac{210}{121}\)

⇒ Y = 17,424

రషీద్ తిరిగి చెల్లించిన మొత్తం = 17,424 × 2 = రూ. 34,848

చెల్లించిన వడ్డీ = 34,848 - 30,240 = రూ. 4,608

∴ రషీద్ చెల్లించిన వడ్డీ రూ. 4,608.

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