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The milk and water in a mixture are in the ratio 7 ∶ 5. When 15 liters of water is added to it, the ratio of milk and water in the new mixture becomes 7 ∶ 8. The total quantity of water in the new mixture is1). 35 litres2). 40 litres 3). 60 litres4). 96 litres |
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Answer» Suppose initially mixture contains 7M and 5m milk and WATER respectively. QUANTITY of water left in mixture = 5m + 15 $(\Rightarrow \frac{{7m}}{{5m + 15}} = \frac{7}{8})$ ⇒ 56m = 35m + 105 ⇒ 21m = 105 ⇒ m = 5 ∴ Quantity of water in mixture = 5m + 15 = 5 × 5 + 15 = 40 lit. |
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