एक दुकानदार 36 रुपये/लीटर दूध खरीदता है और उसमें 200मिली/लीटर पानी मिलाता है। यदि वह मिश्रण को 40 रुपये/लीटर में बेचता है, तो उसका लाभ प्रतिशत ज्ञात कीजिए।

  1. 10%
  2. 11.1%
  3. 20%
  4. 33.3%

Answer (Detailed Solution Below)

Option 4 : 33.3%
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चूँकि, दुकानदार 1 लीटर दूध में 200 मिली पानी मिलाता है, तो उसने 36 रुपये में (1000 + 200 = 1200 मीली = 1.2 लीटर दूध-पानी का मिश्रण बनाया

⇒ 1 लीटर दूध-पानी के मिश्रण का क्रय मूल्य = 36/1.2 = 30 रुपये

अब, 1 लीटर दूध-पानी के मिश्रण का विक्रय मूल्य = 40 रुपये

प्रति लीटर प्राप्त लाभ = 40 – 30 = 10 रुपये

∴ लाभ प्रतिशत = (10/30) × 100 = 33.3%
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