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SSC CHSL 2025 PYQ — Question 63

SSC CHSL - 12 Nov 2025 - Shift 2 • Quantitative Aptitude • Q63

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A sum of money amounts to ₹6,720 in 4 years and to ₹7,680 in 6 years at a certain rate of simple interest. What is the annual rate of interest?

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Correct answer: C

Explanation

Amount after 4 years = ₹6,720
Amount after 6 years = ₹7,680
Interest for 2 years = ₹960
Interest for 1 year = 960 / 2 = ₹480
Interest for 4 years = 4 × 480 = ₹1,920
Principal (P) = 6,720 − 1,920 = ₹4,800 
480=4800×R100480 = \frac{4800 \times R}{100}
R=480×1004800=10%R = \frac{480 \times 100}{4800} = 10\%