एक धनराशि 10% वार्षिक साधारण ब्याज की दर से 2 वर्षों में ₹4080 हो जाती है। उसी धनराशि पर उसी ब्याज दर से 1 वर्ष का साधारण ब्याज (₹ में) क्या है?

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RPF Constable 2024 Official Paper (Held On 03 Mar, 2025 Shift 2)
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  1. 340
  2. 680
  3. 170
  4. 1360

Answer (Detailed Solution Below)

Option 1 : 340
Free
RPF Constable Full Test 1
120 Qs. 120 Marks 90 Mins

Detailed Solution

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दिया गया है:

ब्याज दर (R) = 10% प्रति वर्ष

समय (T) = 2 वर्ष

2 वर्षों के बाद मिश्रधन (A) = ₹4080

प्रयुक्त सूत्र:

मिश्रधन (A) = मूलधन (P) + साधारण ब्याज (SI)

साधारण ब्याज (SI) = (P × R × T) / 100

गणना:

⇒ A = P + SI

⇒ ₹4080 = P + (P × 10 × 2) / 100

⇒ ₹4080 = P + (20P / 100)

⇒ ₹4080 = P (1 + 20 / 100)

⇒ ₹4080 = P × (120 / 100)

⇒ P = ₹4080 × (100 / 120)

⇒ P = ₹3400

1 वर्ष का साधारण ब्याज = (P × R × T) / 100

⇒ SI = (₹3400 × 10 × 1) / 100

⇒ SI = ₹340

1 वर्ष का साधारण ब्याज ₹340 है।

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