RRB NTPC CBT-1 previous year question
An article is sold at a profit of 21%. If the cost price is increased by ₹50 and the selling price is reduced by ₹69, then the profit would be 13.6%. What is the original cost price (in ₹) of the article?
Asked in RRB NTPC 2026 — 15 June Shift 2 · Quantitative Aptitude
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Correct answer: (B) 1,700
If CP is the cost, SP=1.21*CP (21% profit). With the new figures, SP-69=1.136*(CP+50) (13.6% profit); substituting SP gives 1.21CP-69=1.136CP+56.8, so 0.074CP=125.8, giving CP = Rs 1,700.
हिंदी में प्रश्न
एक वस्तु को 21% के लाभ पर बेचा जाता है। यदि क्रय मूल्य में ₹50 की वृद्धि की जाए और विक्रय मूल्य में ₹69 का कमी का जाए, तो लाभ 13.6% होगा। वस्तु का मूल क्रय मूल्य (₹ मै) ज्ञात Hive!
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सही उत्तर: (B) 1,700
यदि CP लागत है, तो SP=1.21*CP (21% लाभ)। नए आंकड़ों के साथ, SP-69=1.136*(CP+50) (13.6% लाभ); SP को प्रतिस्थापित करने पर 1.21CP-69=1.136CP+56.8 मिलता है, अतः 0.074CP=125.8, जिससे CP = 1,700 रुपये प्राप्त होता है।
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