Question
In container P, there is 90 litres of milk and in
container Q there is 50 litres of water. 35% of milk and 70% of water is taken out from the respective containers and are mixed in container R. How much water should be added to container R such that the ratio of milk to water becomes 3:4? STSolution
Quantity of milk in container R = 0.35 × 90 = 31.5 litres Quantity of water in container R = 0.70 × 50 = 35 litres Let x litres of water is added to the container R. According to the question, 31.5/(35 + x) = 3/4 Or, 126 = 105 + 3x Or, 3x = 21 Or, x = 7 Therefore, water added to container R = 7 litres
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