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The ratio of water and milk in a mixture of 65 litre is 5 : 8. What quantity of water(in litre) must be added so that the ratio of water and milk becomes 3 : 4?1. 3 litres2. 4 litres3. 5 litres4. 6 litres |
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Answer» Correct Answer - Option 3 : 5 litres Given: Total mixture = 65 litres Ratio of water and milk in a mixture = 5 : 8 Final ratio of water and milk after adding more water = 3 : 4 Calculation: Amount of water in mixture = (5/13) × 65 litre ⇒ 25 litres Amount of milk in mixture = (8/13) × 65 ⇒ 40 litres Let the amount of water added be x litre According to the question, (25 + x)/40 = 3/4 ⇒ 100 + 4x = 120 ⇒ 4x = 20 ⇒ x = 5 ∴ The amount of water to be added is 5 litres |
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