SSC GD Constable previous year question
If at the same rate of interest, over 2 years, the simple interest is ₹42 and the compound interest is ₹51, find the principal (in ₹).
Asked in SSC GD Constable 2025: 04 Feb 2025 Shift 1 (Morning) · Quantitative Aptitude
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Correct answer: (A) 49
For 2 years, difference (CI−SI) = P(R/100)²; SI per year = 21, so R = (2×21/P)×100; solving with CI−SI = 9 gives P = ₹49.
हिंदी में प्रश्न
यदि समान ब्याज दर पर, 2 वर्ष में, साधारण ब्याज ₹42 तथा चक्रवृद्धि ब्याज ₹51 है, तो मूलधन (₹ में) ज्ञात कीजिए।
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उत्तर और व्याख्या देखें
सही उत्तर: (A) 49
2 वर्ष के लिए, अंतर (CI−SI) = P(R/100)²; इसे SI=42 के साथ हल करने पर मूलधन P = ₹49 प्राप्त होता है।
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