यदि ₹47,100 को 9% वार्षिक ब्याज दर से 2 वर्षों के लिए जमा किया जाता है, तो वार्षिक रूप से संयोजित चक्रवृद्धि ब्याज और साधारण ब्याज के बीच का अंतर है:

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RRB NTPC Graduate Level CBT-I Official Paper (Held On: 05 Jun, 2025 Shift 2)
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  1. ₹391.21
  2. ₹381.51
  3. ₹382.71
  4.  ₹391.81

Answer (Detailed Solution Below)

Option 2 : ₹381.51
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दिया गया है:

मूलधन (P) = ₹47,100

दर (R) = 9%

समय = 2 वर्ष

सूत्र का उपयोग करने पर:

2 वर्षों के लिए अंतर = P\(\times\bigl(\frac{R}{100}\bigr)^2\)

गणना:

\(\frac{R}{100} = \frac{9}{100} = 0.09\)

\((0.09)^2 = 0.0081\)

⇒ अंतर = 47100 × 0.0081 = 381.51

∴ 2 वर्षों के लिए चक्रवृद्धि ब्याज और साधारण ब्याज के बीच अंतर = ₹381.51

Alternate Method

प्रयुक्त सूत्र:

साधारण ब्याज (साधारण ब्याज) = \(\frac{P×r×t}{100}\)

चक्रवृद्धि ब्याज (CI) = P\(\bigl(1+\frac{r}{100}\bigr)^t - 1\)

गणना:

SI = \(\frac{47100×9×2}{100}\) = \(47100×0.18\) = 8478

CI = 47100\(\bigl(1+\frac{9}{100}\bigr)^2 - 1\) = 47100\(×(1.09^2 -1)\)

1.092 = 1.1881 ⇒ CI = 47100\(×0.1881\) = 8859.51

अंतर = CI – SI = 8859.51 – 8478 = 381.51

∴ चक्रवृद्धि और साधारण ब्याज के बीच का अंतर = ₹381.51

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