Selection Post Phase XIV (Graduate)24 Sep 2026Shift 1Compound Interest

If ₹2,000 amounts to ₹2,315.25 in 3 years at compound interest, what is the rate percent per annum?

यदि ₹2,000 की राशि चक्रवृद्धि ब्याज (Compound interest) पर 3 वर्षों में ₹2,315.25 हो जाती है, तो प्रति वर्ष ब्याज दर (Rate of interest) कितने प्रतिशत है?

Answer और ExplanationAnswer and explanation

Answer: (B) 5%

AP = 2315.252000 = 1.157625
1.05³ = 1.157625, इसलिए 1 + R100 = 1.05 ⇒ R = 5
✓
ब्याज दर (Rate of ब्याज (Interest)) 5% प्रति वर्ष है।
AP = 2315.252000 = 1.157625
1.05³ = 1.157625, so 1 + R100 = 1.05 ⇒ R = 5
✓
The rate is 5% per annum.
SMART APPROACH

3 साल में कुल ब्याज (Interest) 2000 पर 315.25 है, यानी लगभग 15.8%, जो 3 × 5% से थोड़ा ज़्यादा है। सिर्फ़ 5% ही बैठता है।

Total interest is 315.25 on 2000, that is about 15.8% in 3 years, a little over 3 × 5%. Only 5% fits.

Source: Selection Post Phase XIV (Graduate) · 24 Sep 2026 · Shift 1। Solution: Prashant Sir, Vijayastra।Source: Selection Post Phase XIV (Graduate) · 24 Sep 2026 · Shift 1. Solution by Prashant Sir, from Vijayastra.