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In a barrel of 56 litres, the volume of milk is 62.5%. If the mixture requires to make 85.71% of milk, how much more amount of pure milk is needed to be added?1). 91 litres2). 88 litres3). 90 litres4). 85 litres |
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Answer» Total volume of mixture = 56 LITRES Amount of milk in mixture = 62.5% of total volume = (5/8) × 56 = 35 litres Let x litres of pure milk is added in the mixture. To CHANGE the proportion of mixture, Required amount of milk = 85.71% of total volume = (6/7) × (56 + x) ⇒ 35 + x = (6/7) × (56 + x) ⇒ 35 + x = 48 + 6x/7 ⇒ x/7 = 13 ⇒ x = 91 litres ∴ Amount of milk required = 91 litres |
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