SSC GD Constable previous year question
If at same rate of interest, in 2 years, the simple interest is ₹40 and compound interest is ₹60, then what is the principal (in ₹)?
Asked in SSC GD Constable 2025: 12 Feb 2025 Shift 2 · Quantitative Aptitude
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Correct answer: (D) 20
P×r = 2000 (from SI). CI−SI = P(r/100)² = 20 ⟹ P×r² = 200000. Dividing gives r = 100%, so P = 2000/100 = ₹20.
हिंदी में प्रश्न
यदि समान ब्याज दर पर, 2 वर्षों में साधारण ब्याज ₹40 है और चक्रवृद्धि ब्याज ₹60 है, तो मूलधन (₹ में) क्या है?
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सही उत्तर: (D) 20
SI से P×r = 2000। CI−SI = P(r/100)² = 20 ⟹ P×r² = 200000। भाग देने पर r = 100%, अतः P = 2000/100 = ₹20।
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