RRB NTPC CBT-1 previous year question
An article is sold at a profit of 58%. If the cost price is increased by ₹20 and the selling price is reduced by ₹74, then the profit would be 52.5%. What is the original cost price (in ₹) of the article?
Asked in RRB NTPC 2026 — 15 June Shift 3 · Quantitative Aptitude
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Correct answer: (A) 1,900
Let CP=C, so SP=1.58C. With new CP=C+20 and new SP=1.58C-74 giving 52.5% profit: 1.58C-74=1.525(C+20). Solving gives 0.055C=104.5, so C=1900.
हिंदी में प्रश्न
एक वस्तु को 58% के लाभ पर बेचा जाता है। यदि क्रय मूल्य में ₹20 की वृद्धि की जाए और विक्रय मूल्य में ₹74 का कमी का जाए, तो लाभ 52.5% होगा। वस्तु का मूल क्रय मूल्य (₹ मै) ज्ञात काजिए।
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उत्तर और व्याख्या देखें
सही उत्तर: (A) 2,100
मान लें CP=C, अतः SP=1.58C। नए CP=C+20 और नए SP=1.58C-74 से 52.5% लाभ मिलता है: 1.58C-74=1.525(C+20)। हल करने पर 0.055C=104.5, अतः C=1900 है।
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