Multiple choice

In a mixture of milk and water the proportion of water by weight was 60%. If in 50 of mixture 10 water was added, what would be the percentage of water? दूध और पानी के एक मिश्रण में पानी का भार के अनुपात हिस्सा 60% था। यदि 50 लीटर मिश्रण में 10 लीटर पानी मिलाया गया तो पानी का प्रतिशत क्या होगा?

  1. 45.5 %

  2. 72 %

  3. 66.67 %

  4. 35%
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C Correct answer
Explanation

In 50 litres of mixture, water = 50 × 0.6 = 30 litres, milk = 20 litres. After adding 10 litres water: total = 60 litres, water = 40 litres. Water percentage = 40/60 × 100 = 66.67%. Must calculate actual quantities before finding new percentage.

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