RRB NTPC CBT-1 previous year question
A shopkeeper buys two types of rice costing ₹32 per kg and ₹40 per kg. He buys a total of 45 kg of rice for ₹1600. The ratio of the quantity (in kg) of rice costing ₹32 per kg to that costing ₹40 per kg is
Asked in RRB NTPC 2026 — 16 June Shift 1 · Quantitative Aptitude
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Correct answer: (B) 5:4
Let quantity of ₹32-rice = a, ₹40-rice = b, with a+b=45. Given 32a+40b=1600, substituting b=45-a gives -8a=-200, so a=25 and b=20. The ratio a:b = 25:20 = 5:4.
हिंदी में प्रश्न
एक दुकानदार दो क़िस्मों के चावल खरीदता है जिनका मूल्य क्रमशः ₹32 Vic kg और ₹40 प्रति kg है। वह कुल 45 kg चावल ₹1600 में खरीदता है। ₹32 प्रति kg मूल्य वाले चावल का मात्रा और ₹40 प्रति मूल्य वाले चावल की मात्रा (kg मै) का अनुपात क्या है?
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सही उत्तर: (B) 5:4
मान लें ₹32 वाले चावल की मात्रा = a, ₹40 वाले की = b, जहाँ a+b=45। दिया गया है 32a+40b=1600, b=45-a रखने पर -8a=-200, अतः a=25 और b=20। अनुपात a:b = 25:20 = 5:4 है।
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